45637725 has 24 divisors (see below), whose sum is σ = 86234560. Its totient is φ = 20862720.

The previous prime is 45637723. The next prime is 45637729. The reversal of 45637725 is 52773654.

It is not a de Polignac number, because 45637725 - 2¹ = 45637723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45637721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42940 + ... + 43989.

Almost surely, 2^45637725 is an apocalyptic number.

It is an amenable number.

45637725 is a deficient number, since it is larger than the sum of its proper divisors (40596835).

45637725 is a wasteful number, since it uses less digits than its factorization.

45637725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86949 (or 86944 counting only the distinct ones).

The product of its digits is 176400, while the sum is 39.

The square root of 45637725 is about 6755.5699241441. The cubic root of 45637725 is about 357.3616919795.

The spelling of 45637725 in words is "forty-five million, six hundred thirty-seven thousand, seven hundred twenty-five".