165501001373257 has 16 divisors (see below), whose sum is σ = 184716376542720. Its totient is φ = 147004156166400.

The previous prime is 165501001373243. The next prime is 165501001373327. The reversal of 165501001373257 is 752373100105561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165501001373257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165501001383257) 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, 588818457 + ... + 589099462.

It is an arithmetic number, because the mean of its divisors is an integer number (11544773533920).

Almost surely, 2^{165501001373257} is an apocalyptic number.

It is an amenable number.

165501001373257 is a deficient number, since it is larger than the sum of its proper divisors (19215375169463).

165501001373257 is a wasteful number, since it uses less digits than its factorization.

165501001373257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177918224.

The product of its (nonzero) digits is 661500, while the sum is 46.

The spelling of 165501001373257 in words is "one hundred sixty-five trillion, five hundred one billion, one million, three hundred seventy-three thousand, two hundred fifty-seven".