55000277478 has 16 divisors (see below), whose sum is σ = 122222838960. Its totient is φ = 18333425808.

The previous prime is 55000277401. The next prime is 55000277489. The reversal of 55000277478 is 87477200055.

55000277478 is a `hidden beast` number, since 5 + 500 + 0 + 2 + 7 + 74 + 78 = 666.

55000277478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 509261775 + ... + 509261882.

It is an arithmetic number, because the mean of its divisors is an integer number (7638927435).

Almost surely, 2^55000277478 is an apocalyptic number.

55000277478 is an abundant number, since it is smaller than the sum of its proper divisors (67222561482).

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

55000277478 is a wasteful number, since it uses less digits than its factorization.

55000277478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018523668 (or 1018523662 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 45.

The spelling of 55000277478 in words is "fifty-five billion, two hundred seventy-seven thousand, four hundred seventy-eight".