51461873137836 has 144 divisors (see below), whose sum is σ = 157969021077504. Its totient is φ = 13789587322368.

The previous prime is 51461873137817. The next prime is 51461873137837. The reversal of 51461873137836 is 63873137816415.

51461873137836 is a `hidden beast` number, since 5 + 1 + 4 + 618 + 7 + 3 + 1 + 3 + 7 + 8 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (51461873137837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20011260 + ... + 22436003.

It is an arithmetic number, because the mean of its divisors is an integer number (1097007090816).

Almost surely, 2^{51461873137836} is an apocalyptic number.

It is an amenable number.

51461873137836 is an abundant number, since it is smaller than the sum of its proper divisors (106507147939668).

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

51461873137836 is a wasteful number, since it uses less digits than its factorization.

51461873137836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42447580 (or 42447575 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 51461873137836 in words is "fifty-one trillion, four hundred sixty-one billion, eight hundred seventy-three million, one hundred thirty-seven thousand, eight hundred thirty-six".