55691745 has 48 divisors (see below), whose sum is σ = 98141760. Its totient is φ = 26930176.

The previous prime is 55691737. The next prime is 55691747. The reversal of 55691745 is 54719655.

55691745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55691745 - 2³ = 55691737 is a prime.

It is a super-2 number, since 2×55691745² = 6203140922290050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55691697 and 55691706.

It is not an unprimeable number, because it can be changed into a prime (55691747) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 125494 + ... + 125936.

It is an arithmetic number, because the mean of its divisors is an integer number (2044620).

Almost surely, 2^55691745 is an apocalyptic number.

It is an amenable number.

55691745 is a deficient number, since it is larger than the sum of its proper divisors (42450015).

55691745 is a wasteful number, since it uses less digits than its factorization.

55691745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 497 counting only the distinct ones).

The product of its digits is 189000, while the sum is 42.

The square root of 55691745 is about 7462.6901985812. The cubic root of 55691745 is about 381.8829557444.

The spelling of 55691745 in words is "fifty-five million, six hundred ninety-one thousand, seven hundred forty-five".