164387082489720 has 32 divisors (see below), whose sum is σ = 493161247469520. Its totient is φ = 43836555330560.

The previous prime is 164387082489713. The next prime is 164387082489739. The reversal of 164387082489720 is 27984280783461.

It is a super-2 number, since 2×164387082489720² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

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, 684946176921 + ... + 684946177160.

Almost surely, 2^{164387082489720} is an apocalyptic number.

164387082489720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164387082489720 is an abundant number, since it is smaller than the sum of its proper divisors (328774164979800).

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

164387082489720 is a wasteful number, since it uses less digits than its factorization.

164387082489720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369892354095 (or 1369892354091 counting only the distinct ones).

The product of its (nonzero) digits is 260112384, while the sum is 69.

The spelling of 164387082489720 in words is "one hundred sixty-four trillion, three hundred eighty-seven billion, eighty-two million, four hundred eighty-nine thousand, seven hundred twenty".