164690222865 has 32 divisors (see below), whose sum is σ = 307555246080. Its totient is φ = 73685106624.

The previous prime is 164690222861. The next prime is 164690222897. The reversal of 164690222865 is 568222096461.

It is not a de Polignac number, because 164690222865 - 2² = 164690222861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164690222861) 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, 16681005 + ... + 16690874.

It is an arithmetic number, because the mean of its divisors is an integer number (9611101440).

Almost surely, 2^164690222865 is an apocalyptic number.

164690222865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164690222865 is a deficient number, since it is larger than the sum of its proper divisors (142865023215).

164690222865 is a wasteful number, since it uses less digits than its factorization.

164690222865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33371941.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 164690222865 in words is "one hundred sixty-four billion, six hundred ninety million, two hundred twenty-two thousand, eight hundred sixty-five".