54631522640 has 40 divisors (see below), whose sum is σ = 127154023080. Its totient is φ = 21829257216.

The previous prime is 54631522597. The next prime is 54631522667. The reversal of 54631522640 is 4622513645.

It can be written as a sum of positive squares in 4 ways, for example, as 19571776 + 54611950864 = 4424^2 + 233692^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 54631522594 and 54631522603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289445 + ... + 439364.

It is an arithmetic number, because the mean of its divisors is an integer number (3178850577).

Almost surely, 2^54631522640 is an apocalyptic number.

It is an amenable number.

54631522640 is an abundant number, since it is smaller than the sum of its proper divisors (72522500440).

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

54631522640 is a wasteful number, since it uses less digits than its factorization.

54631522640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729759 (or 729753 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 54631522640 in words is "fifty-four billion, six hundred thirty-one million, five hundred twenty-two thousand, six hundred forty".