164961879280 has 40 divisors (see below), whose sum is σ = 418403314224. Its totient is φ = 59986137600.

The previous prime is 164961879263. The next prime is 164961879281. The reversal of 164961879280 is 82978169461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164961879281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93727461 + ... + 93729220.

Almost surely, 2^164961879280 is an apocalyptic number.

164961879280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164961879280 is an abundant number, since it is smaller than the sum of its proper divisors (253441434944).

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

164961879280 is a wasteful number, since it uses less digits than its factorization.

164961879280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187456705 (or 187456699 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 164961879280 in words is "one hundred sixty-four billion, nine hundred sixty-one million, eight hundred seventy-nine thousand, two hundred eighty".