167855831521613 has 4 divisors (see below), whose sum is σ = 167860124878140. Its totient is φ = 167851538165088.

The previous prime is 167855831521589. The next prime is 167855831521661. The reversal of 167855831521613 is 316125138558761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25083850190884 + 142771981330729 = 5008378^2 + 11948723^2 .

It is a cyclic number.

It is not a de Polignac number, because 167855831521613 - 2²⁸ = 167855563086157 is a prime.

It is a super-2 number, since 2×167855831521613² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167855831527613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146619618 + ... + 2146697811.

It is an arithmetic number, because the mean of its divisors is an integer number (41965031219535).

Almost surely, 2^{167855831521613} is an apocalyptic number.

It is an amenable number.

167855831521613 is a deficient number, since it is larger than the sum of its proper divisors (4293356527).

167855831521613 is an equidigital number, since it uses as much as digits as its factorization.

167855831521613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293356526.

The product of its digits is 36288000, while the sum is 62.

The spelling of 167855831521613 in words is "one hundred sixty-seven trillion, eight hundred fifty-five billion, eight hundred thirty-one million, five hundred twenty-one thousand, six hundred thirteen".