2321645553 has 12 divisors (see below), whose sum is σ = 3499292160. Its totient is φ = 1480469496.

The previous prime is 2321645527. The next prime is 2321645561. The reversal of 2321645553 is 3555461232.

2321645553 is a `hidden beast` number, since 2 + 3 + 2 + 1 + 645 + 5 + 5 + 3 = 666.

It is not a de Polignac number, because 2321645553 - 2⁸ = 2321645297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2321645593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5607633 + ... + 5608046.

It is an arithmetic number, because the mean of its divisors is an integer number (291607680).

Almost surely, 2^2321645553 is an apocalyptic number.

2321645553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2321645553 is a deficient number, since it is larger than the sum of its proper divisors (1177646607).

2321645553 is a wasteful number, since it uses less digits than its factorization.

2321645553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11215708 (or 11215705 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 2321645553 is about 48183.4572545391. The cubic root of 2321645553 is about 1324.1341067158.

The spelling of 2321645553 in words is "two billion, three hundred twenty-one million, six hundred forty-five thousand, five hundred fifty-three".