51694560 has 72 divisors (see below), whose sum is σ = 176412600. Its totient is φ = 13784832.

The previous prime is 51694553. The next prime is 51694583. The reversal of 51694560 is 6549615.

51694560 is a `hidden beast` number, since 5 + 1 + 6 + 94 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16510 + ... + 19389.

It is an arithmetic number, because the mean of its divisors is an integer number (2450175).

Almost surely, 2^51694560 is an apocalyptic number.

It is an amenable number.

51694560 is an abundant number, since it is smaller than the sum of its proper divisors (124718040).

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

51694560 is a wasteful number, since it uses less digits than its factorization.

51694560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35920 (or 35909 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 51694560 is about 7189.8929060174. The cubic root of 51694560 is about 372.5188735689.

The spelling of 51694560 in words is "fifty-one million, six hundred ninety-four thousand, five hundred sixty".