55861965 has 12 divisors (see below), whose sum is σ = 96827484. Its totient is φ = 29793024.

The previous prime is 55861951. The next prime is 55861999. The reversal of 55861965 is 56916855.

It is a happy number.

55861965 is a `hidden beast` number, since 5 + 586 + 1 + 9 + 65 = 666.

55861965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 41139396 + 14722569 = 6414^2 + 3837^2 .

It is not a de Polignac number, because 55861965 - 2⁷ = 55861837 is a prime.

It is a super-2 number, since 2×55861965² = 6241118267322450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1241377 = 55861965 / (5 + 5 + 8 + 6 + 1 + 9 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 55861965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 620644 + ... + 620733.

It is an arithmetic number, because the mean of its divisors is an integer number (8068957).

Almost surely, 2^55861965 is an apocalyptic number.

It is an amenable number.

55861965 is a deficient number, since it is larger than the sum of its proper divisors (40965519).

55861965 is a wasteful number, since it uses less digits than its factorization.

55861965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241388 (or 1241385 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 55861965 is about 7474.0862317744. The cubic root of 55861965 is about 382.2716309499.

The spelling of 55861965 in words is "fifty-five million, eight hundred sixty-one thousand, nine hundred sixty-five".