51414463656868 has 24 divisors (see below), whose sum is σ = 100237747450680. Its totient is φ = 22911485130240.

The previous prime is 51414463656827. The next prime is 51414463656911. The reversal of 51414463656868 is 86865636441415.

It can be written as a sum of positive squares in 4 ways, for example, as 392128944804 + 51022334712064 = 626202^2 + 7142992^2 .

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, 17047234453 + ... + 17047237468.

It is an arithmetic number, because the mean of its divisors is an integer number (4176572810445).

Almost surely, 2^{51414463656868} is an apocalyptic number.

51414463656868 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51414463656868 is a deficient number, since it is larger than the sum of its proper divisors (48823283793812).

51414463656868 is a wasteful number, since it uses less digits than its factorization.

51414463656868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34094471967 (or 34094471965 counting only the distinct ones).

The product of its digits is 398131200, while the sum is 67.

The spelling of 51414463656868 in words is "fifty-one trillion, four hundred fourteen billion, four hundred sixty-three million, six hundred fifty-six thousand, eight hundred sixty-eight".