55400006720 has 28 divisors (see below), whose sum is σ = 131921266764. Its totient is φ = 22160002560.

The previous prime is 55400006687. The next prime is 55400006741. The reversal of 55400006720 is 2760000455.

It can be written as a sum of positive squares in 2 ways, for example, as 26013818944 + 29386187776 = 161288^2 + 171424^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86562191 + ... + 86562830.

It is an arithmetic number, because the mean of its divisors is an integer number (4711473813).

Almost surely, 2^55400006720 is an apocalyptic number.

It is an amenable number.

55400006720 is an abundant number, since it is smaller than the sum of its proper divisors (76521260044).

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

55400006720 is a wasteful number, since it uses less digits than its factorization.

55400006720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173125038 (or 173125028 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The spelling of 55400006720 in words is "fifty-five billion, four hundred million, six thousand, seven hundred twenty".