55745907 has 16 divisors (see below), whose sum is σ = 89943552. Its totient is φ = 29980800.

The previous prime is 55745903. The next prime is 55745929. The reversal of 55745907 is 70954755.

It is not a de Polignac number, because 55745907 - 2² = 55745903 is a prime.

It is a super-2 number, since 2×55745907² = 6215212294505298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55745903) 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, 77719 + ... + 78432.

It is an arithmetic number, because the mean of its divisors is an integer number (5621472).

Almost surely, 2^55745907 is an apocalyptic number.

55745907 is a deficient number, since it is larger than the sum of its proper divisors (34197645).

55745907 is a wasteful number, since it uses less digits than its factorization.

55745907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156178.

The product of its (nonzero) digits is 220500, while the sum is 42.

The square root of 55745907 is about 7466.3181689505. The cubic root of 55745907 is about 382.0067134224.

It can be divided in two parts, 557 and 45907, that added together give a palindrome (46464).

The spelling of 55745907 in words is "fifty-five million, seven hundred forty-five thousand, nine hundred seven".