136806857331 has 64 divisors (see below), whose sum is σ = 193552588800. Its totient is φ = 85829014656.

The previous prime is 136806857321. The next prime is 136806857333. The reversal of 136806857331 is 133758608631.

It is not a de Polignac number, because 136806857331 - 2⁷ = 136806857203 is a prime.

It is a super-2 number, since 2×136806857331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136806857333) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 394255900 + ... + 394256246.

It is an arithmetic number, because the mean of its divisors is an integer number (3024259200).

Almost surely, 2^136806857331 is an apocalyptic number.

136806857331 is a deficient number, since it is larger than the sum of its proper divisors (56745731469).

136806857331 is a wasteful number, since it uses less digits than its factorization.

136806857331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 136806857331 in words is "one hundred thirty-six billion, eight hundred six million, eight hundred fifty-seven thousand, three hundred thirty-one".