51600645 has 40 divisors (see below), whose sum is σ = 94682016. Its totient is φ = 26871264.

The previous prime is 51600629. The next prime is 51600649. The reversal of 51600645 is 54600615.

It is a happy number.

51600645 is a `hidden beast` number, since 5 + 16 + 0 + 0 + 645 = 666.

It is not a de Polignac number, because 51600645 - 2⁴ = 51600629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51600649) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15934 + ... + 18896.

Almost surely, 2^51600645 is an apocalyptic number.

It is an amenable number.

51600645 is a deficient number, since it is larger than the sum of its proper divisors (43081371).

51600645 is a wasteful number, since it uses less digits than its factorization.

51600645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023 (or 3014 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51600645 is about 7183.3588939994. The cubic root of 51600645 is about 372.2931482213.

The spelling of 51600645 in words is "fifty-one million, six hundred thousand, six hundred forty-five".