55400725668 has 24 divisors (see below), whose sum is σ = 132018751872. Its totient is φ = 18073995424.

The previous prime is 55400725663. The next prime is 55400725697. The reversal of 55400725668 is 86652700455.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55400725663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49113555 + ... + 49114682.

It is an arithmetic number, because the mean of its divisors is an integer number (5500781328).

Almost surely, 2^55400725668 is an apocalyptic number.

It is an amenable number.

55400725668 is an abundant number, since it is smaller than the sum of its proper divisors (76618026204).

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

55400725668 is a wasteful number, since it uses less digits than its factorization.

55400725668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98228291 (or 98228289 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 55400725668 in words is "fifty-five billion, four hundred million, seven hundred twenty-five thousand, six hundred sixty-eight".