55556172279 has 12 divisors (see below), whose sum is σ = 80253576000. Its totient is φ = 37034784384.

The previous prime is 55556172277. The next prime is 55556172283. The reversal of 55556172279 is 97227165555.

55556172279 is a `hidden beast` number, since 5 + 5 + 5 + 561 + 7 + 2 + 2 + 79 = 666.

It is not a de Polignac number, because 55556172279 - 2¹ = 55556172277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556172277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85479 + ... + 344120.

It is an arithmetic number, because the mean of its divisors is an integer number (6687798000).

Almost surely, 2^55556172279 is an apocalyptic number.

55556172279 is a deficient number, since it is larger than the sum of its proper divisors (24697403721).

55556172279 is a wasteful number, since it uses less digits than its factorization.

55556172279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443974 (or 443971 counting only the distinct ones).

The product of its digits is 6615000, while the sum is 54.

The spelling of 55556172279 in words is "fifty-five billion, five hundred fifty-six million, one hundred seventy-two thousand, two hundred seventy-nine".