8172401664 has 88 divisors (see below), whose sum is σ = 24894271168. Its totient is φ = 2334965760.

The previous prime is 8172401663. The next prime is 8172401683. The reversal of 8172401664 is 4661042718.

It is a super-3 number, since 3×8172401664³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172401663) 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, 168517 + ... + 211524.

Almost surely, 2^8172401664 is an apocalyptic number.

8172401664 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8172401664 is an abundant number, since it is smaller than the sum of its proper divisors (16721869504).

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

8172401664 is a wasteful number, since it uses less digits than its factorization.

8172401664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380071 (or 380053 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 8172401664 is about 90401.3366272867. The cubic root of 8172401664 is about 2014.2648208860.

The spelling of 8172401664 in words is "eight billion, one hundred seventy-two million, four hundred one thousand, six hundred sixty-four".