51021364544 has 56 divisors (see below), whose sum is σ = 106607152800. Its totient is φ = 24160550400.

The previous prime is 51021364507. The next prime is 51021364579. The reversal of 51021364544 is 44546312015.

It is a super-3 number, since 3×51021364544³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7658687 + ... + 7665345.

Almost surely, 2^51021364544 is an apocalyptic number.

It is an amenable number.

51021364544 is an abundant number, since it is smaller than the sum of its proper divisors (55585788256).

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

51021364544 is a wasteful number, since it uses less digits than its factorization.

51021364544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991 (or 12981 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 51021364544 its reverse (44546312015), we get a palindrome (95567676559).

The spelling of 51021364544 in words is "fifty-one billion, twenty-one million, three hundred sixty-four thousand, five hundred forty-four".