12111502455 has 48 divisors (see below), whose sum is σ = 23315283360. Its totient is φ = 5962574592.

The previous prime is 12111502397. The next prime is 12111502463. The reversal of 12111502455 is 55420511121.

It is a happy number.

12111502455 is a `hidden beast` number, since 1 + 2 + 111 + 502 + 45 + 5 = 666.

It is not a de Polignac number, because 12111502455 - 2⁸ = 12111502199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242614 + ... + 288243.

It is an arithmetic number, because the mean of its divisors is an integer number (485735070).

Almost surely, 2^12111502455 is an apocalyptic number.

12111502455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12111502455 is a deficient number, since it is larger than the sum of its proper divisors (11203780905).

12111502455 is a wasteful number, since it uses less digits than its factorization.

12111502455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530897 (or 530878 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 12111502455 in words is "twelve billion, one hundred eleven million, five hundred two thousand, four hundred fifty-five".