2156363660 has 48 divisors (see below), whose sum is σ = 4944899232. Its totient is φ = 783360000.

The previous prime is 2156363659. The next prime is 2156363681. The reversal of 2156363660 is 663636512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249410 + ... + 257910.

It is an arithmetic number, because the mean of its divisors is an integer number (103018734).

Almost surely, 2^2156363660 is an apocalyptic number.

2156363660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156363660 is an abundant number, since it is smaller than the sum of its proper divisors (2788535572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156363660 is a wasteful number, since it uses less digits than its factorization.

2156363660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9674 (or 9672 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 2156363660 is about 46436.6628861291. The cubic root of 2156363660 is about 1291.9350124028.

The spelling of 2156363660 in words is "two billion, one hundred fifty-six million, three hundred sixty-three thousand, six hundred sixty".