2111564455 has 32 divisors (see below), whose sum is σ = 3402137088. Its totient is φ = 1215043200.

The previous prime is 2111564453. The next prime is 2111564461. The reversal of 2111564455 is 5544651112.

It is not a de Polignac number, because 2111564455 - 2¹ = 2111564453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111564455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111564453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205941 + ... + 215950.

It is an arithmetic number, because the mean of its divisors is an integer number (106316784).

Almost surely, 2^2111564455 is an apocalyptic number.

2111564455 is a deficient number, since it is larger than the sum of its proper divisors (1290572633).

2111564455 is a wasteful number, since it uses less digits than its factorization.

2111564455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421927.

The product of its digits is 24000, while the sum is 34.

The square root of 2111564455 is about 45951.7622621810. The cubic root of 2111564455 is about 1282.9255298781.

The spelling of 2111564455 in words is "two billion, one hundred eleven million, five hundred sixty-four thousand, four hundred fifty-five".