155847666720231 has 96 divisors (see below), whose sum is σ = 248561284608000. Its totient is φ = 97299681228288.

The previous prime is 155847666720199. The next prime is 155847666720299. The reversal of 155847666720231 is 132027666748551.

It is not a de Polignac number, because 155847666720231 - 2⁵ = 155847666720199 is a prime.

It is a super-2 number, since 2×155847666720231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155847666720131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1708941571 + ... + 1709032763.

It is an arithmetic number, because the mean of its divisors is an integer number (2589180048000).

Almost surely, 2^{155847666720231} is an apocalyptic number.

155847666720231 is a deficient number, since it is larger than the sum of its proper divisors (92713617887769).

155847666720231 is an equidigital number, since it uses as much as digits as its factorization.

155847666720231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95475 (or 95463 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 155847666720231 in words is "one hundred fifty-five trillion, eight hundred forty-seven billion, six hundred sixty-six million, seven hundred twenty thousand, two hundred thirty-one".