51574735440 has 120 divisors (see below), whose sum is σ = 182321262240. Its totient is φ = 13029403392.

The previous prime is 51574735427. The next prime is 51574735441. The reversal of 51574735440 is 4453747515.

51574735440 is a `hidden beast` number, since 5 + 1 + 574 + 7 + 35 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51574735441) 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, 1871362 + ... + 1898721.

It is an arithmetic number, because the mean of its divisors is an integer number (1519343852).

Almost surely, 2^51574735440 is an apocalyptic number.

It is an amenable number.

51574735440 is an abundant number, since it is smaller than the sum of its proper divisors (130746526800).

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

51574735440 is a wasteful number, since it uses less digits than its factorization.

51574735440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770121 (or 3770112 counting only the distinct ones).

The product of its (nonzero) digits is 1176000, while the sum is 45.

The spelling of 51574735440 in words is "fifty-one billion, five hundred seventy-four million, seven hundred thirty-five thousand, four hundred forty".