51764728676505 has 64 divisors (see below), whose sum is σ = 90771913467648. Its totient is φ = 25037351239680.

The previous prime is 51764728676503. The next prime is 51764728676537. The reversal of 51764728676505 is 50567682746715.

It is not a de Polignac number, because 51764728676505 - 2¹ = 51764728676503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51764728676505.

It is not an unprimeable number, because it can be changed into a prime (51764728676503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7396611 + ... + 12579320.

It is an arithmetic number, because the mean of its divisors is an integer number (1418311147932).

Almost surely, 2^{51764728676505} is an apocalyptic number.

It is an amenable number.

51764728676505 is a deficient number, since it is larger than the sum of its proper divisors (39007184791143).

51764728676505 is a wasteful number, since it uses less digits than its factorization.

51764728676505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19976186.

The product of its (nonzero) digits is 592704000, while the sum is 69.

The spelling of 51764728676505 in words is "fifty-one trillion, seven hundred sixty-four billion, seven hundred twenty-eight million, six hundred seventy-six thousand, five hundred five".