2156990610 has 16 divisors (see below), whose sum is σ = 5176777536. Its totient is φ = 575197488.

The previous prime is 2156990597. The next prime is 2156990611. The reversal of 2156990610 is 160996512.

It is not an unprimeable number, because it can be changed into a prime (2156990611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35949814 + ... + 35949873.

It is an arithmetic number, because the mean of its divisors is an integer number (323548596).

Almost surely, 2^2156990610 is an apocalyptic number.

2156990610 is an abundant number, since it is smaller than the sum of its proper divisors (3019786926).

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

2156990610 is a wasteful number, since it uses less digits than its factorization.

2156990610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71899697.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 2156990610 is about 46443.4129882807. The cubic root of 2156990610 is about 1292.0602077621.

The spelling of 2156990610 in words is "two billion, one hundred fifty-six million, nine hundred ninety thousand, six hundred ten".