54640320862064 has 80 divisors (see below), whose sum is σ = 121808697077760. Its totient is φ = 23259162355200.

The previous prime is 54640320862033. The next prime is 54640320862067. The reversal of 54640320862064 is 46026802304645.

It is a happy number.

It is a super-2 number, since 2×54640320862064² (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 (54640320862067) 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, 8472764 + ... + 13456164.

It is an arithmetic number, because the mean of its divisors is an integer number (1522608713472).

Almost surely, 2^{54640320862064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54640320862064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60904348538880).

54640320862064 is an abundant number, since it is smaller than the sum of its proper divisors (67168376215696).

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

54640320862064 is a wasteful number, since it uses less digits than its factorization.

54640320862064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984078 (or 4984072 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 50.

The spelling of 54640320862064 in words is "fifty-four trillion, six hundred forty billion, three hundred twenty million, eight hundred sixty-two thousand, sixty-four".