111550554977 has 2 divisors, whose sum is σ = 111550554978. Its totient is φ = 111550554976.

The previous prime is 111550554971. The next prime is 111550555043. The reversal of 111550554977 is 779455055111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102435843136 + 9114711841 = 320056^2 + 95471^2 .

It is a cyclic number.

It is not a de Polignac number, because 111550554977 - 2²⁰ = 111549506401 is a prime.

It is not a weakly prime, because it can be changed into another prime (111550554971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55775277488 + 55775277489.

It is an arithmetic number, because the mean of its divisors is an integer number (55775277489).

Almost surely, 2^111550554977 is an apocalyptic number.

It is an amenable number.

111550554977 is a deficient number, since it is larger than the sum of its proper divisors (1).

111550554977 is an equidigital number, since it uses as much as digits as its factorization.

111550554977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102500, while the sum is 50.

The spelling of 111550554977 in words is "one hundred eleven billion, five hundred fifty million, five hundred fifty-four thousand, nine hundred seventy-seven".