51505661704 has 32 divisors (see below), whose sum is σ = 111440833920. Its totient is φ = 21859543296.

The previous prime is 51505661699. The next prime is 51505661717. The reversal of 51505661704 is 40716650515.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4459009 + ... + 4470544.

It is an arithmetic number, because the mean of its divisors is an integer number (3482526060).

Almost surely, 2^51505661704 is an apocalyptic number.

It is an amenable number.

51505661704 is an abundant number, since it is smaller than the sum of its proper divisors (59935172216).

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

51505661704 is a wasteful number, since it uses less digits than its factorization.

51505661704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929669 (or 8929665 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 51505661704 in words is "fifty-one billion, five hundred five million, six hundred sixty-one thousand, seven hundred four".