2158491610 has 16 divisors (see below), whose sum is σ = 4238492832. Its totient is φ = 784906000.

The previous prime is 2158491593. The next prime is 2158491611. The reversal of 2158491610 is 161948512.

It is a self number, because there is not a number n which added to its sum of digits gives 2158491610.

It is not an unprimeable number, because it can be changed into a prime (2158491611) 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, 9811216 + ... + 9811435.

It is an arithmetic number, because the mean of its divisors is an integer number (264905802).

Almost surely, 2^2158491610 is an apocalyptic number.

2158491610 is a deficient number, since it is larger than the sum of its proper divisors (2080001222).

2158491610 is a wasteful number, since it uses less digits than its factorization.

2158491610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19622669.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 2158491610 is about 46459.5696277957. The cubic root of 2158491610 is about 1292.3598432325.

The spelling of 2158491610 in words is "two billion, one hundred fifty-eight million, four hundred ninety-one thousand, six hundred ten".