165651506715 has 16 divisors (see below), whose sum is σ = 265047552000. Its totient is φ = 88345756512.

The previous prime is 165651506693. The next prime is 165651506717. The reversal of 165651506715 is 517605156561.

It is not a de Polignac number, because 165651506715 - 2¹⁵ = 165651473947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165651506717) 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, 1232076 + ... + 1359894.

It is an arithmetic number, because the mean of its divisors is an integer number (16565472000).

Almost surely, 2^165651506715 is an apocalyptic number.

165651506715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165651506715 is a deficient number, since it is larger than the sum of its proper divisors (99396045285).

165651506715 is a wasteful number, since it uses less digits than its factorization.

165651506715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214226.

The product of its (nonzero) digits is 945000, while the sum is 48.

The spelling of 165651506715 in words is "one hundred sixty-five billion, six hundred fifty-one million, five hundred six thousand, seven hundred fifteen".