111563441651 has 2 divisors, whose sum is σ = 111563441652. Its totient is φ = 111563441650.

The previous prime is 111563441621. The next prime is 111563441657. The reversal of 111563441651 is 156144365111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111563441651 - 2²² = 111559247347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111563441657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55781720825 + 55781720826.

It is an arithmetic number, because the mean of its divisors is an integer number (55781720826).

Almost surely, 2^111563441651 is an apocalyptic number.

111563441651 is a deficient number, since it is larger than the sum of its proper divisors (1).

111563441651 is an equidigital number, since it uses as much as digits as its factorization.

111563441651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The spelling of 111563441651 in words is "one hundred eleven billion, five hundred sixty-three million, four hundred forty-one thousand, six hundred fifty-one".