155677640650217 has 16 divisors (see below), whose sum is σ = 177951873214080. Its totient is φ = 133412052035328.

The previous prime is 155677640650211. The next prime is 155677640650243. The reversal of 155677640650217 is 712056046776551.

It is a cyclic number.

It is not a de Polignac number, because 155677640650217 - 2²⁸ = 155677372214761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155677640650217.

It is not an unprimeable number, because it can be changed into a prime (155677640650211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064953759 + ... + 2065029147.

It is an arithmetic number, because the mean of its divisors is an integer number (11121992075880).

Almost surely, 2^{155677640650217} is an apocalyptic number.

It is an amenable number.

155677640650217 is a deficient number, since it is larger than the sum of its proper divisors (22274232563863).

155677640650217 is an equidigital number, since it uses as much as digits as its factorization.

155677640650217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128800.

The product of its (nonzero) digits is 74088000, while the sum is 62.

The spelling of 155677640650217 in words is "one hundred fifty-five trillion, six hundred seventy-seven billion, six hundred forty million, six hundred fifty thousand, two hundred seventeen".