51544646160 has 80 divisors (see below), whose sum is σ = 182615323776. Its totient is φ = 11781633024.

The previous prime is 51544646123. The next prime is 51544646171. The reversal of 51544646160 is 6164644515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15338989 + ... + 15342348.

Almost surely, 2^51544646160 is an apocalyptic number.

It is an amenable number.

51544646160 is an abundant number, since it is smaller than the sum of its proper divisors (131070677616).

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

51544646160 is a wasteful number, since it uses less digits than its factorization.

51544646160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30681360 (or 30681354 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 51544646160 in words is "fifty-one billion, five hundred forty-four million, six hundred forty-six thousand, one hundred sixty".