55111905979 has 8 divisors (see below), whose sum is σ = 61397879760. Its totient is φ = 49118303136.

The previous prime is 55111905941. The next prime is 55111906007. The reversal of 55111905979 is 97950911155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55111905979 - 2⁷ = 55111905851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55111905479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73092337 + ... + 73093090.

It is an arithmetic number, because the mean of its divisors is an integer number (7674734970).

Almost surely, 2^55111905979 is an apocalyptic number.

55111905979 is a deficient number, since it is larger than the sum of its proper divisors (6285973781).

55111905979 is a wasteful number, since it uses less digits than its factorization.

55111905979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146185469.

The product of its (nonzero) digits is 637875, while the sum is 52.

The spelling of 55111905979 in words is "fifty-five billion, one hundred eleven million, nine hundred five thousand, nine hundred seventy-nine".