2155658368 has 16 divisors (see below), whose sum is σ = 4294475910. Its totient is φ = 1077829120.

The previous prime is 2155658359. The next prime is 2155658381. The reversal of 2155658368 is 8638565512.

It can be written as a sum of positive squares in only one way, i.e., 1736555584 + 419102784 = 41672^2 + 20472^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8420413 + ... + 8420668.

Almost surely, 2^2155658368 is an apocalyptic number.

It is an amenable number.

2155658368 is a deficient number, since it is larger than the sum of its proper divisors (2138817542).

2155658368 is an equidigital number, since it uses as much as digits as its factorization.

2155658368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841095 (or 16841083 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 49.

The square root of 2155658368 is about 46429.0681362441. The cubic root of 2155658368 is about 1291.7941439574.

The spelling of 2155658368 in words is "two billion, one hundred fifty-five million, six hundred fifty-eight thousand, three hundred sixty-eight".