51378664023 has 12 divisors (see below), whose sum is σ = 74328338448. Its totient is φ = 34199498400.

The previous prime is 51378664013. The next prime is 51378664033. The reversal of 51378664023 is 32046687315.

51378664023 is a `hidden beast` number, since 513 + 78 + 6 + 6 + 40 + 23 = 666.

It is an interprime number because it is at equal distance from previous prime (51378664013) and next prime (51378664033).

It is not a de Polignac number, because 51378664023 - 2⁵ = 51378663991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51378664023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51378664013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4405878 + ... + 4417523.

It is an arithmetic number, because the mean of its divisors is an integer number (6194028204).

Almost surely, 2^51378664023 is an apocalyptic number.

51378664023 is a deficient number, since it is larger than the sum of its proper divisors (22949674425).

51378664023 is a wasteful number, since it uses less digits than its factorization.

51378664023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8824054 (or 8824051 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 51378664023 in words is "fifty-one billion, three hundred seventy-eight million, six hundred sixty-four thousand, twenty-three".