51601264460664 has 64 divisors (see below), whose sum is σ = 129286962604800. Its totient is φ = 17162608007424.

The previous prime is 51601264460663. The next prime is 51601264460689. The reversal of 51601264460664 is 46606446210615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51601264460663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30124749 + ... + 31791555.

It is an arithmetic number, because the mean of its divisors is an integer number (2020108790700).

Almost surely, 2^{51601264460664} is an apocalyptic number.

It is an amenable number.

51601264460664 is an abundant number, since it is smaller than the sum of its proper divisors (77685698144136).

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

51601264460664 is a wasteful number, since it uses less digits than its factorization.

51601264460664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669652 (or 1669648 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 51.

The spelling of 51601264460664 in words is "fifty-one trillion, six hundred one billion, two hundred sixty-four million, four hundred sixty thousand, six hundred sixty-four".