172946447680 has 28 divisors (see below), whose sum is σ = 411828729300. Its totient is φ = 69178578944.

The previous prime is 172946447669. The next prime is 172946447683. The reversal of 172946447680 is 86744649271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32729151744 + 140217295936 = 180912^2 + 374456^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172946447683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270228505 + ... + 270229144.

Almost surely, 2^172946447680 is an apocalyptic number.

172946447680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172946447680 is an abundant number, since it is smaller than the sum of its proper divisors (238882281620).

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

172946447680 is an equidigital number, since it uses as much as digits as its factorization.

172946447680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540457666 (or 540457656 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 172946447680 in words is "one hundred seventy-two billion, nine hundred forty-six million, four hundred forty-seven thousand, six hundred eighty".