51897930872 has 32 divisors (see below), whose sum is σ = 101316171600. Its totient is φ = 24901036800.

The previous prime is 51897930863. The next prime is 51897930881. The reversal of 51897930872 is 27803979815.

It is an interprime number because it is at equal distance from previous prime (51897930863) and next prime (51897930881).

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276922 + ... + 1316937.

Almost surely, 2^51897930872 is an apocalyptic number.

It is an amenable number.

51897930872 is a deficient number, since it is larger than the sum of its proper divisors (49418240728).

51897930872 is a wasteful number, since it uses less digits than its factorization.

51897930872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593967 (or 2593963 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 51897930872 in words is "fifty-one billion, eight hundred ninety-seven million, nine hundred thirty thousand, eight hundred seventy-two".