111550135545 has 24 divisors (see below), whose sum is σ = 193666993416. Its totient is φ = 59396967168.

The previous prime is 111550135523. The next prime is 111550135547. The reversal of 111550135545 is 545531055111.

111550135545 is a `hidden beast` number, since 1 + 1 + 1 + 550 + 13 + 55 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5964781824 + 105585353721 = 77232^2 + 324939^2 .

It is not a de Polignac number, because 111550135545 - 2⁸ = 111550135289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111550135547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1981062 + ... + 2036591.

It is an arithmetic number, because the mean of its divisors is an integer number (8069458059).

Almost surely, 2^111550135545 is an apocalyptic number.

111550135545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111550135545 is a deficient number, since it is larger than the sum of its proper divisors (82116857871).

111550135545 is a wasteful number, since it uses less digits than its factorization.

111550135545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018281 (or 4018278 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 36.

The spelling of 111550135545 in words is "one hundred eleven billion, five hundred fifty million, one hundred thirty-five thousand, five hundred forty-five".