172498999680 has 1280 divisors, whose sum is σ = 750709555200. Its totient is φ = 36870930432.

The previous prime is 172498999663. The next prime is 172498999721. The reversal of 172498999680 is 86999894271.

172498999680 is a `hidden beast` number, since 1 + 72 + 498 + 9 + 9 + 9 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 172498999599 and 172498999608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 875629342 + ... + 875629538.

It is an arithmetic number, because the mean of its divisors is an integer number (586491840).

Almost surely, 2^172498999680 is an apocalyptic number.

172498999680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172498999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375354777600).

172498999680 is an abundant number, since it is smaller than the sum of its proper divisors (578210555520).

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

172498999680 is a wasteful number, since it uses less digits than its factorization.

172498999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 172498999680 in words is "one hundred seventy-two billion, four hundred ninety-eight million, nine hundred ninety-nine thousand, six hundred eighty".