51638366374 has 32 divisors (see below), whose sum is σ = 91486273536. Its totient is φ = 21391572960.

The previous prime is 51638366369. The next prime is 51638366401. The reversal of 51638366374 is 47366383615.

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, 300459 + ... + 439945.

It is an arithmetic number, because the mean of its divisors is an integer number (2858946048).

Almost surely, 2^51638366374 is an apocalyptic number.

51638366374 is a deficient number, since it is larger than the sum of its proper divisors (39847907162).

51638366374 is a wasteful number, since it uses less digits than its factorization.

51638366374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140380.

The product of its digits is 6531840, while the sum is 52.

The spelling of 51638366374 in words is "fifty-one billion, six hundred thirty-eight million, three hundred sixty-six thousand, three hundred seventy-four".