2609156985 has 8 divisors (see below), whose sum is σ = 4174651200. Its totient is φ = 1391550384.

The previous prime is 2609156971. The next prime is 2609156989. The reversal of 2609156985 is 5896519062.

2609156985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2609156985 - 2¹³ = 2609148793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2609156989) 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, 86971885 + ... + 86971914.

It is an arithmetic number, because the mean of its divisors is an integer number (521831400).

Almost surely, 2^2609156985 is an apocalyptic number.

It is an amenable number.

2609156985 is a deficient number, since it is larger than the sum of its proper divisors (1565494215).

2609156985 is a wasteful number, since it uses less digits than its factorization.

2609156985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173943807.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 2609156985 is about 51079.9078405590. The cubic root of 2609156985 is about 1376.6812685855.

The spelling of 2609156985 in words is "two billion, six hundred nine million, one hundred fifty-six thousand, nine hundred eighty-five".