51263433984 has 72 divisors (see below), whose sum is σ = 155926294720. Its totient is φ = 14646693888.

The previous prime is 51263433983. The next prime is 51263433997. The reversal of 51263433984 is 48933436215.

It is a super-2 number, since 2×51263433984² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263433983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4762429 + ... + 4773180.

Almost surely, 2^51263433984 is an apocalyptic number.

It is an amenable number.

51263433984 is an abundant number, since it is smaller than the sum of its proper divisors (104662860736).

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

51263433984 is an equidigital number, since it uses as much as digits as its factorization.

51263433984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9535635 (or 9535621 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The spelling of 51263433984 in words is "fifty-one billion, two hundred sixty-three million, four hundred thirty-three thousand, nine hundred eighty-four".