45515640 has 64 divisors (see below), whose sum is σ = 143740800. Its totient is φ = 11498112.

The previous prime is 45515563. The next prime is 45515641. The reversal of 45515640 is 4651554.

45515640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 45515598 and 45515607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45515641) 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 15 ways as a sum of consecutive naturals, for example, 7702 + ... + 12261.

It is an arithmetic number, because the mean of its divisors is an integer number (2245950).

Almost surely, 2^45515640 is an apocalyptic number.

45515640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45515640 is an abundant number, since it is smaller than the sum of its proper divisors (98225160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45515640 is a wasteful number, since it uses less digits than its factorization.

45515640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19996 (or 19992 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 45515640 is about 6746.5279959398. The cubic root of 45515640 is about 357.0427492374.

The spelling of 45515640 in words is "forty-five million, five hundred fifteen thousand, six hundred forty".