111397545977 has 2 divisors, whose sum is σ = 111397545978. Its totient is φ = 111397545976.

The previous prime is 111397545971. The next prime is 111397545979. The reversal of 111397545977 is 779545793111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87145401616 + 24252144361 = 295204^2 + 155731^2 .

It is an emirp because it is prime and its reverse (779545793111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111397545977 - 2³⁴ = 94217676793 is a prime.

Together with 111397545979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111397545971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55698772988 + 55698772989.

It is an arithmetic number, because the mean of its divisors is an integer number (55698772989).

Almost surely, 2^111397545977 is an apocalyptic number.

It is an amenable number.

111397545977 is a deficient number, since it is larger than the sum of its proper divisors (1).

111397545977 is an equidigital number, since it uses as much as digits as its factorization.

111397545977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8334900, while the sum is 59.

The spelling of 111397545977 in words is "one hundred eleven billion, three hundred ninety-seven million, five hundred forty-five thousand, nine hundred seventy-seven".