164690091264 has 72 divisors (see below), whose sum is σ = 439216845760. Its totient is φ = 54783848448.

The previous prime is 164690091253. The next prime is 164690091277. The reversal of 164690091264 is 462190096461.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153852 + ... + 594180.

Almost surely, 2^164690091264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164690091264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219608422880).

164690091264 is an abundant number, since it is smaller than the sum of its proper divisors (274526754496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164690091264 is an equidigital number, since it uses as much as digits as its factorization.

164690091264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440835 (or 440821 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 164690091264 in words is "one hundred sixty-four billion, six hundred ninety million, ninety-one thousand, two hundred sixty-four".