164157734399 has 4 divisors (see below), whose sum is σ = 169818345960. Its totient is φ = 158497122840.

The previous prime is 164157734371. The next prime is 164157734401. The reversal of 164157734399 is 993437751461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993437751461 = 317 ⋅3133873033.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164157734399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164157731399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2830305737 + ... + 2830305794.

It is an arithmetic number, because the mean of its divisors is an integer number (42454586490).

Almost surely, 2^164157734399 is an apocalyptic number.

164157734399 is a deficient number, since it is larger than the sum of its proper divisors (5660611561).

164157734399 is an equidigital number, since it uses as much as digits as its factorization.

164157734399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660611560.

The product of its digits is 17146080, while the sum is 59.

The spelling of 164157734399 in words is "one hundred sixty-four billion, one hundred fifty-seven million, seven hundred thirty-four thousand, three hundred ninety-nine".