165152521515 has 32 divisors (see below), whose sum is σ = 274883155200. Its totient is φ = 84568910720.

The previous prime is 165152521489. The next prime is 165152521529. The reversal of 165152521515 is 515125251561.

It is not a de Polignac number, because 165152521515 - 2¹² = 165152517419 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 982641 + ... + 1138370.

It is an arithmetic number, because the mean of its divisors is an integer number (8590098600).

Almost surely, 2^165152521515 is an apocalyptic number.

165152521515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165152521515 is a deficient number, since it is larger than the sum of its proper divisors (109730633685).

165152521515 is a wasteful number, since it uses less digits than its factorization.

165152521515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121227.

The product of its digits is 75000, while the sum is 39.

The spelling of 165152521515 in words is "one hundred sixty-five billion, one hundred fifty-two million, five hundred twenty-one thousand, five hundred fifteen".