51513797456 has 80 divisors (see below), whose sum is σ = 109404872640. Its totient is φ = 23303132160.

The previous prime is 51513797417. The next prime is 51513797471. The reversal of 51513797456 is 65479731515.

It is a junction number, because it is equal to n+sod(n) for n = 51513797398 and 51513797407.

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, 54053876 + ... + 54054828.

It is an arithmetic number, because the mean of its divisors is an integer number (1367560908).

Almost surely, 2^51513797456 is an apocalyptic number.

It is an amenable number.

51513797456 is an abundant number, since it is smaller than the sum of its proper divisors (57891075184).

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

51513797456 is a wasteful number, since it uses less digits than its factorization.

51513797456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 2118 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 53.

The spelling of 51513797456 in words is "fifty-one billion, five hundred thirteen million, seven hundred ninety-seven thousand, four hundred fifty-six".