2155633623 has 48 divisors (see below), whose sum is σ = 3817142784. Its totient is φ = 1153500480.

The previous prime is 2155633621. The next prime is 2155633681. The reversal of 2155633623 is 3263365512.

2155633623 is a `hidden beast` number, since 2 + 15 + 5 + 633 + 6 + 2 + 3 = 666.

It is not a de Polignac number, because 2155633623 - 2¹ = 2155633621 is a prime.

It is a super-2 number, since 2×2155633623² = 9293512633216212258, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155633621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6811 + ... + 66012.

It is an arithmetic number, because the mean of its divisors is an integer number (79523808).

Almost surely, 2^2155633623 is an apocalyptic number.

2155633623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2155633623 is a deficient number, since it is larger than the sum of its proper divisors (1661509161).

2155633623 is a wasteful number, since it uses less digits than its factorization.

2155633623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72876 (or 72873 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 2155633623 is about 46428.8016537149. The cubic root of 2155633623 is about 1291.7892010640.

The spelling of 2155633623 in words is "two billion, one hundred fifty-five million, six hundred thirty-three thousand, six hundred twenty-three".