55540022155 has 16 divisors (see below), whose sum is σ = 66756057984. Its totient is φ = 44360058880.

The previous prime is 55540022147. The next prime is 55540022183. The reversal of 55540022155 is 55122004555.

It is not a de Polignac number, because 55540022155 - 2³ = 55540022147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55540022155.

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, 14765475 + ... + 14769235.

It is an arithmetic number, because the mean of its divisors is an integer number (4172253624).

Almost surely, 2^55540022155 is an apocalyptic number.

55540022155 is a deficient number, since it is larger than the sum of its proper divisors (11216035829).

55540022155 is a wasteful number, since it uses less digits than its factorization.

55540022155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766.

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 55540022155 in words is "fifty-five billion, five hundred forty million, twenty-two thousand, one hundred fifty-five".