164125815 has 32 divisors (see below), whose sum is σ = 313168896. Its totient is φ = 71765760.

The previous prime is 164125771. The next prime is 164125817. The reversal of 164125815 is 518521461.

It is not a de Polignac number, because 164125815 - 2⁶ = 164125751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164125817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31566 + ... + 36395.

It is an arithmetic number, because the mean of its divisors is an integer number (9786528).

Almost surely, 2^164125815 is an apocalyptic number.

164125815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164125815 is a deficient number, since it is larger than the sum of its proper divisors (149043081).

164125815 is a wasteful number, since it uses less digits than its factorization.

164125815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67999.

The product of its digits is 9600, while the sum is 33.

The square root of 164125815 is about 12811.1597835637. The cubic root of 164125815 is about 547.5103060965.

The spelling of 164125815 in words is "one hundred sixty-four million, one hundred twenty-five thousand, eight hundred fifteen".