55139149680 has 80 divisors (see below), whose sum is σ = 173095111680. Its totient is φ = 14517644544.

The previous prime is 55139149603. The next prime is 55139149697. The reversal of 55139149680 is 8694193155.

55139149680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 1435132 + ... + 1473051.

It is an arithmetic number, because the mean of its divisors is an integer number (2163688896).

Almost surely, 2^55139149680 is an apocalyptic number.

It is an amenable number.

55139149680 is an abundant number, since it is smaller than the sum of its proper divisors (117955962000).

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

55139149680 is a wasteful number, since it uses less digits than its factorization.

55139149680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908278 (or 2908272 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 55139149680 in words is "fifty-five billion, one hundred thirty-nine million, one hundred forty-nine thousand, six hundred eighty".