51010136765 has 32 divisors (see below), whose sum is σ = 71877200640. Its totient is φ = 34018942464.

The previous prime is 51010136761. The next prime is 51010136819. The reversal of 51010136765 is 56763101015.

It is a cyclic number.

It is not a de Polignac number, because 51010136765 - 2² = 51010136761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51010136761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3817466 + ... + 3830804.

It is an arithmetic number, because the mean of its divisors is an integer number (2246162520).

Almost surely, 2^51010136765 is an apocalyptic number.

It is an amenable number.

51010136765 is a deficient number, since it is larger than the sum of its proper divisors (20867063875).

51010136765 is a wasteful number, since it uses less digits than its factorization.

51010136765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16341.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 51010136765 in words is "fifty-one billion, ten million, one hundred thirty-six thousand, seven hundred sixty-five".