51996597040 has 40 divisors (see below), whose sum is σ = 121273510320. Its totient is φ = 20733017856.

The previous prime is 51996597031. The next prime is 51996597043. The reversal of 51996597040 is 4079569915.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×51996597040² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51996597043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999810 + ... + 1050529.

It is an arithmetic number, because the mean of its divisors is an integer number (3031837758).

Almost surely, 2^51996597040 is an apocalyptic number.

It is an amenable number.

51996597040 is an abundant number, since it is smaller than the sum of its proper divisors (69276913280).

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

51996597040 is a wasteful number, since it uses less digits than its factorization.

51996597040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050669 (or 2050663 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 51996597040 in words is "fifty-one billion, nine hundred ninety-six million, five hundred ninety-seven thousand, forty".