165151955 has 8 divisors (see below), whose sum is σ = 205016400. Its totient is φ = 127565536.

The previous prime is 165151913. The next prime is 165151967. The reversal of 165151955 is 559151561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165151955 - 2⁸ = 165151699 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569345 + ... + 569634.

It is an arithmetic number, because the mean of its divisors is an integer number (25627050).

Almost surely, 2^165151955 is an apocalyptic number.

165151955 is a deficient number, since it is larger than the sum of its proper divisors (39864445).

165151955 is a wasteful number, since it uses less digits than its factorization.

165151955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139013.

The product of its digits is 33750, while the sum is 38.

The square root of 165151955 is about 12851.1460578425. The cubic root of 165151955 is about 548.6489760635.

The spelling of 165151955 in words is "one hundred sixty-five million, one hundred fifty-one thousand, nine hundred fifty-five".