51501120000464 has 20 divisors (see below), whose sum is σ = 99784630403556. Its totient is φ = 25750247638272.

The previous prime is 51501120000457. The next prime is 51501120000467. The reversal of 51501120000464 is 46400002110515.

It can be written as a sum of positive squares in 2 ways, for example, as 22249334286400 + 29251785714064 = 4716920^2 + 5408492^2 .

It is a super-2 number, since 2×51501120000464² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501120000467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18159509 + ... + 20803124.

Almost surely, 2^{51501120000464} is an apocalyptic number.

It is an amenable number.

51501120000464 is a deficient number, since it is larger than the sum of its proper divisors (48283510403092).

51501120000464 is a wasteful number, since it uses less digits than its factorization.

51501120000464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39045254 (or 39045248 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 51501120000464 its reverse (46400002110515), we get a palindrome (97901122110979).

The spelling of 51501120000464 in words is "fifty-one trillion, five hundred one billion, one hundred twenty million, four hundred sixty-four", and thus it is an aban number.