51263033044520 has 96 divisors (see below), whose sum is σ = 126856665016200. Its totient is φ = 18629930964480.

The previous prime is 51263033044499. The next prime is 51263033044537. The reversal of 51263033044520 is 2544033036215.

It can be written as a sum of positive squares in 4 ways, for example, as 51049853226724 + 213179817796 = 7144918^2 + 461714^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4904942 + ... + 11250978.

Almost surely, 2^{51263033044520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51263033044520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63428332508100).

51263033044520 is an abundant number, since it is smaller than the sum of its proper divisors (75593631971680).

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

51263033044520 is a wasteful number, since it uses less digits than its factorization.

51263033044520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347739 (or 6347724 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 51263033044520 in words is "fifty-one trillion, two hundred sixty-three billion, thirty-three million, forty-four thousand, five hundred twenty".