51997755024 has 60 divisors (see below), whose sum is σ = 154081590156. Its totient is φ = 16313020416.

The previous prime is 51997754999. The next prime is 51997755127. The reversal of 51997755024 is 42055779915.

It is a happy number.

51997755024 is a `hidden beast` number, since 5 + 19 + 9 + 77 + 550 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46526490000 + 5471265024 = 215700^2 + 73968^2 .

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, 10618009 + ... + 10622904.

Almost surely, 2^51997755024 is an apocalyptic number.

It is an amenable number.

51997755024 is an abundant number, since it is smaller than the sum of its proper divisors (102083835132).

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

51997755024 is a wasteful number, since it uses less digits than its factorization.

51997755024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21240944 (or 21240935 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

The spelling of 51997755024 in words is "fifty-one billion, nine hundred ninety-seven million, seven hundred fifty-five thousand, twenty-four".