51765142986 has 32 divisors (see below), whose sum is σ = 115308244800. Its totient is φ = 17213858640.

The previous prime is 51765142973. The next prime is 51765143011. The reversal of 51765142986 is 68924156715.

It is a happy number.

51765142986 is a `hidden beast` number, since 51 + 76 + 514 + 2 + 9 + 8 + 6 = 666.

It is a super-2 number, since 2×51765142986² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121305 + ... + 1166556.

It is an arithmetic number, because the mean of its divisors is an integer number (3603382650).

Almost surely, 2^51765142986 is an apocalyptic number.

51765142986 is an abundant number, since it is smaller than the sum of its proper divisors (63543101814).

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

51765142986 is a wasteful number, since it uses less digits than its factorization.

51765142986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288291 (or 2288285 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 51765142986 in words is "fifty-one billion, seven hundred sixty-five million, one hundred forty-two thousand, nine hundred eighty-six".