51063660564 has 48 divisors (see below), whose sum is σ = 136956908928. Its totient is φ = 14505280128.

The previous prime is 51063660559. The next prime is 51063660623. The reversal of 51063660564 is 46506636015.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1742407 + ... + 1771470.

It is an arithmetic number, because the mean of its divisors is an integer number (2853268936).

Almost surely, 2^51063660564 is an apocalyptic number.

It is an amenable number.

51063660564 is an abundant number, since it is smaller than the sum of its proper divisors (85893248364).

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

51063660564 is a wasteful number, since it uses less digits than its factorization.

51063660564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514064 (or 3514062 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 51063660564 in words is "fifty-one billion, sixty-three million, six hundred sixty thousand, five hundred sixty-four".