51662123136 has 128 divisors (see below), whose sum is σ = 164204006400. Its totient is φ = 15896024064.

The previous prime is 51662123101. The next prime is 51662123143. The reversal of 51662123136 is 63132126615.

51662123136 is a `hidden beast` number, since 5 + 1 + 6 + 621 + 23 + 1 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51662123136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530016 + ... + 619871.

It is an arithmetic number, because the mean of its divisors is an integer number (1282843800).

Almost surely, 2^51662123136 is an apocalyptic number.

It is an amenable number.

51662123136 is an abundant number, since it is smaller than the sum of its proper divisors (112541883264).

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

51662123136 is a wasteful number, since it uses less digits than its factorization.

51662123136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149923 (or 1149905 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 51662123136 in words is "fifty-one billion, six hundred sixty-two million, one hundred twenty-three thousand, one hundred thirty-six".