51612500784 has 40 divisors (see below), whose sum is σ = 143588625712. Its totient is φ = 15880769280.

The previous prime is 51612500777. The next prime is 51612500813. The reversal of 51612500784 is 48700521615.

It is a super-2 number, since 2×51612500784² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41355547 + ... + 41356794.

Almost surely, 2^51612500784 is an apocalyptic number.

It is an amenable number.

51612500784 is an abundant number, since it is smaller than the sum of its proper divisors (91976124928).

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

51612500784 is a wasteful number, since it uses less digits than its factorization.

51612500784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82712365 (or 82712359 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 51612500784 in words is "fifty-one billion, six hundred twelve million, five hundred thousand, seven hundred eighty-four".