172147672203860 has 24 divisors (see below), whose sum is σ = 361511339408520. Its totient is φ = 68858835018624.

The previous prime is 172147672203811. The next prime is 172147672203863. The reversal of 172147672203860 is 68302276741271.

It can be written as a sum of positive squares in 4 ways, for example, as 527244445456 + 171620427758404 = 726116^2 + 13100398^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172147672203796 and 172147672203805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172147672203863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8518319 + ... + 20417078.

It is an arithmetic number, because the mean of its divisors is an integer number (15062972475355).

Almost surely, 2^{172147672203860} is an apocalyptic number.

172147672203860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172147672203860 is an abundant number, since it is smaller than the sum of its proper divisors (189363667204660).

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

172147672203860 is a wasteful number, since it uses less digits than its factorization.

172147672203860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29232875 (or 29232873 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 56.

The spelling of 172147672203860 in words is "one hundred seventy-two trillion, one hundred forty-seven billion, six hundred seventy-two million, two hundred three thousand, eight hundred sixty".