51515624046 has 32 divisors (see below), whose sum is σ = 108486541440. Its totient is φ = 16263202464.

The previous prime is 51515624021. The next prime is 51515624051. The reversal of 51515624046 is 64042651515.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 51515623995 and 51515624013.

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, 322881 + ... + 455283.

It is an arithmetic number, because the mean of its divisors is an integer number (3390204420).

Almost surely, 2^51515624046 is an apocalyptic number.

51515624046 is an abundant number, since it is smaller than the sum of its proper divisors (56970917394).

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

51515624046 is a wasteful number, since it uses less digits than its factorization.

51515624046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135840.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 51515624046 in words is "fifty-one billion, five hundred fifteen million, six hundred twenty-four thousand, forty-six".