402166164309 has 24 divisors (see below), whose sum is σ = 671750079840. Its totient is φ = 212131602144.

The previous prime is 402166164289. The next prime is 402166164319. The reversal of 402166164309 is 903461661204.

It is a happy number.

It is not a de Polignac number, because 402166164309 - 2⁸ = 402166164053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402166164319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105222099 + ... + 105225920.

It is an arithmetic number, because the mean of its divisors is an integer number (27989586660).

Almost surely, 2^402166164309 is an apocalyptic number.

402166164309 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

402166164309 is a deficient number, since it is larger than the sum of its proper divisors (269583915531).

402166164309 is a wasteful number, since it uses less digits than its factorization.

402166164309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210448049 (or 210448042 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 402166164309 in words is "four hundred two billion, one hundred sixty-six million, one hundred sixty-four thousand, three hundred nine".