55961878 has 32 divisors (see below), whose sum is σ = 102032640. Its totient is φ = 22485600.

The previous prime is 55961869. The next prime is 55961879. The reversal of 55961878 is 87816955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55961879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25825 + ... + 27907.

It is an arithmetic number, because the mean of its divisors is an integer number (3188520).

Almost surely, 2^55961878 is an apocalyptic number.

55961878 is a deficient number, since it is larger than the sum of its proper divisors (46070762).

55961878 is a wasteful number, since it uses less digits than its factorization.

55961878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212.

The product of its digits is 604800, while the sum is 49.

The square root of 55961878 is about 7480.7672066440. The cubic root of 55961878 is about 382.4994016537.

The spelling of 55961878 in words is "fifty-five million, nine hundred sixty-one thousand, eight hundred seventy-eight".