51464105556 has 12 divisors (see below), whose sum is σ = 120082912992. Its totient is φ = 17154701848.

The previous prime is 51464105519. The next prime is 51464105569. The reversal of 51464105556 is 65550146415.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×51464105556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144337720 + ... + 2144337743.

It is an arithmetic number, because the mean of its divisors is an integer number (10006909416).

Almost surely, 2^51464105556 is an apocalyptic number.

It is an amenable number.

51464105556 is an abundant number, since it is smaller than the sum of its proper divisors (68618807436).

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

51464105556 is a wasteful number, since it uses less digits than its factorization.

51464105556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288675470 (or 4288675468 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 51464105556 in words is "fifty-one billion, four hundred sixty-four million, one hundred five thousand, five hundred fifty-six".