111608906631 has 16 divisors (see below), whose sum is σ = 151786275840. Its totient is φ = 72921823520.

The previous prime is 111608906621. The next prime is 111608906653. The reversal of 111608906631 is 136609806111.

It is a cyclic number.

It is not a de Polignac number, because 111608906631 - 2⁶ = 111608906567 is a prime.

It is a super-2 number, since 2×111608906631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111608906621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240411 + ... + 530108.

It is an arithmetic number, because the mean of its divisors is an integer number (9486642240).

Almost surely, 2^111608906631 is an apocalyptic number.

111608906631 is a deficient number, since it is larger than the sum of its proper divisors (40177369209).

111608906631 is an equidigital number, since it uses as much as digits as its factorization.

111608906631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771486.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 111608906631 in words is "one hundred eleven billion, six hundred eight million, nine hundred six thousand, six hundred thirty-one".