111620051660 has 24 divisors (see below), whose sum is σ = 252433040496. Its totient is φ = 41213557440.

The previous prime is 111620051657. The next prime is 111620051663. The reversal of 111620051660 is 66150026111.

It is an interprime number because it is at equal distance from previous prime (111620051657) and next prime (111620051663).

It is not an unprimeable number, because it can be changed into a prime (111620051663) 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, 214653686 + ... + 214654205.

It is an arithmetic number, because the mean of its divisors is an integer number (10518043354).

Almost surely, 2^111620051660 is an apocalyptic number.

111620051660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111620051660 is an abundant number, since it is smaller than the sum of its proper divisors (140812988836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111620051660 is a wasteful number, since it uses less digits than its factorization.

111620051660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429307913 (or 429307911 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 111620051660 its reverse (66150026111), we get a palindrome (177770077771).

The spelling of 111620051660 in words is "one hundred eleven billion, six hundred twenty million, fifty-one thousand, six hundred sixty".