111551553553 has 4 divisors (see below), whose sum is σ = 121692603888. Its totient is φ = 101410503220.

The previous prime is 111551553551. The next prime is 111551553571. The reversal of 111551553553 is 355355155111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111551553553 - 2¹ = 111551553551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111551553551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5070525151 + ... + 5070525172.

It is an arithmetic number, because the mean of its divisors is an integer number (30423150972).

Almost surely, 2^111551553553 is an apocalyptic number.

It is an amenable number.

111551553553 is a deficient number, since it is larger than the sum of its proper divisors (10141050335).

111551553553 is a wasteful number, since it uses less digits than its factorization.

111551553553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141050334.

The product of its digits is 140625, while the sum is 40.

The spelling of 111551553553 in words is "one hundred eleven billion, five hundred fifty-one million, five hundred fifty-three thousand, five hundred fifty-three".