164356351978 has 32 divisors (see below), whose sum is σ = 303447352320. Its totient is φ = 65015758080.

The previous prime is 164356351969. The next prime is 164356351997. The reversal of 164356351978 is 879153653461.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5094663 + ... + 5126821.

It is an arithmetic number, because the mean of its divisors is an integer number (9482729760).

Almost surely, 2^164356351978 is an apocalyptic number.

164356351978 is a deficient number, since it is larger than the sum of its proper divisors (139091000342).

164356351978 is a wasteful number, since it uses less digits than its factorization.

164356351978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60262.

The product of its digits is 16329600, while the sum is 58.

The spelling of 164356351978 in words is "one hundred sixty-four billion, three hundred fifty-six million, three hundred fifty-one thousand, nine hundred seventy-eight".