51165160864 has 12 divisors (see below), whose sum is σ = 100731410514. Its totient is φ = 25582580416.

The previous prime is 51165160859. The next prime is 51165160883. The reversal of 51165160864 is 46806156115.

It can be written as a sum of positive squares in only one way, i.e., 30308024464 + 20857136400 = 174092^2 + 144420^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51165160864.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799455607 + ... + 799455670.

Almost surely, 2^51165160864 is an apocalyptic number.

It is an amenable number.

51165160864 is a deficient number, since it is larger than the sum of its proper divisors (49566249650).

51165160864 is a wasteful number, since it uses less digits than its factorization.

51165160864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598911287 (or 1598911279 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 51165160864 in words is "fifty-one billion, one hundred sixty-five million, one hundred sixty thousand, eight hundred sixty-four".