51021678675 has 48 divisors (see below), whose sum is σ = 92124996480. Its totient is φ = 24710784000.

The previous prime is 51021678661. The next prime is 51021678691. The reversal of 51021678675 is 57687612015.

It is not a de Polignac number, because 51021678675 - 2¹⁵ = 51021645907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 733140 + ... + 799710.

It is an arithmetic number, because the mean of its divisors is an integer number (1919270760).

Almost surely, 2^51021678675 is an apocalyptic number.

51021678675 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51021678675 is a deficient number, since it is larger than the sum of its proper divisors (41103317805).

51021678675 is a wasteful number, since it uses less digits than its factorization.

51021678675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67524 (or 67519 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 51021678675 in words is "fifty-one billion, twenty-one million, six hundred seventy-eight thousand, six hundred seventy-five".