156849291009 has 6 divisors (see below), whose sum is σ = 226560087026. Its totient is φ = 104566194000.

The previous prime is 156849290987. The next prime is 156849291023. The reversal of 156849291009 is 900192948651.

156849291009 is a `hidden beast` number, since 1 + 5 + 68 + 492 + 91 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128524401009 + 28324890000 = 358503^2 + 168300^2 .

It is not a de Polignac number, because 156849291009 - 2⁷ = 156849290881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156849291029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8713849492 + ... + 8713849509.

Almost surely, 2^156849291009 is an apocalyptic number.

It is an amenable number.

156849291009 is a deficient number, since it is larger than the sum of its proper divisors (69710796017).

156849291009 is a wasteful number, since it uses less digits than its factorization.

156849291009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17427699007 (or 17427699004 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 156849291009 in words is "one hundred fifty-six billion, eight hundred forty-nine million, two hundred ninety-one thousand, nine".