164719891995 has 32 divisors (see below), whose sum is σ = 263992172544. Its totient is φ = 87703968000.

The previous prime is 164719891957. The next prime is 164719892011. The reversal of 164719891995 is 599198917461.

It is not a de Polignac number, because 164719891995 - 2¹⁰ = 164719890971 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, 27120279 + ... + 27126351.

It is an arithmetic number, because the mean of its divisors is an integer number (8249755392).

Almost surely, 2^164719891995 is an apocalyptic number.

164719891995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164719891995 is a deficient number, since it is larger than the sum of its proper divisors (99272280549).

164719891995 is a wasteful number, since it uses less digits than its factorization.

164719891995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8803.

The product of its digits is 44089920, while the sum is 69.

The spelling of 164719891995 in words is "one hundred sixty-four billion, seven hundred nineteen million, eight hundred ninety-one thousand, nine hundred ninety-five".