2156440108 has 6 divisors (see below), whose sum is σ = 3773770196. Its totient is φ = 1078220052.

The previous prime is 2156440103. The next prime is 2156440163. The reversal of 2156440108 is 8010446512.

It is a self number, because there is not a number n which added to its sum of digits gives 2156440108.

It is not an unprimeable number, because it can be changed into a prime (2156440103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269555010 + ... + 269555017.

Almost surely, 2^2156440108 is an apocalyptic number.

It is an amenable number.

2156440108 is a deficient number, since it is larger than the sum of its proper divisors (1617330088).

2156440108 is a wasteful number, since it uses less digits than its factorization.

2156440108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539110031 (or 539110029 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2156440108 is about 46437.4860215322. The cubic root of 2156440108 is about 1291.9502795680.

The spelling of 2156440108 in words is "two billion, one hundred fifty-six million, four hundred forty thousand, one hundred eight".