51097681907040 has 96 divisors (see below), whose sum is σ = 165307906118880. Its totient is φ = 13257776922624.

The previous prime is 51097681907039. The next prime is 51097681907053. The reversal of 51097681907040 is 4070918679015.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×51097681907040² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438543105 + ... + 1438578624.

It is an arithmetic number, because the mean of its divisors is an integer number (1721957355405).

Almost surely, 2^{51097681907040} is an apocalyptic number.

It is an amenable number.

51097681907040 is an abundant number, since it is smaller than the sum of its proper divisors (114210224211840).

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

51097681907040 is a wasteful number, since it uses less digits than its factorization.

51097681907040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877121784 (or 2877121776 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 57.

The spelling of 51097681907040 in words is "fifty-one trillion, ninety-seven billion, six hundred eighty-one million, nine hundred seven thousand, forty".