45509685 has 32 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 22311168.

The previous prime is 45509657. The next prime is 45509687. The reversal of 45509685 is 58690554.

It is not a de Polignac number, because 45509685 - 2¹⁵ = 45476917 is a prime.

It is a super-2 number, since 2×45509685² = 4142262857598450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45509687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81427 + ... + 81983.

It is an arithmetic number, because the mean of its divisors is an integer number (2460780).

Almost surely, 2^45509685 is an apocalyptic number.

It is an amenable number.

45509685 is a deficient number, since it is larger than the sum of its proper divisors (33235275).

45509685 is a wasteful number, since it uses less digits than its factorization.

45509685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 45509685 is about 6746.0866433807. The cubic root of 45509685 is about 357.0271774303.

The spelling of 45509685 in words is "forty-five million, five hundred nine thousand, six hundred eighty-five".