172804281376 has 24 divisors (see below), whose sum is σ = 360220690620. Its totient is φ = 81319661568.

The previous prime is 172804281373. The next prime is 172804281409. The reversal of 172804281376 is 673182408271.

It can be written as a sum of positive squares in 2 ways, for example, as 162618627600 + 10185653776 = 403260^2 + 100924^2 .

It is a super-2 number, since 2×172804281376² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172804281373) 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, 158826921 + ... + 158828008.

Almost surely, 2^172804281376 is an apocalyptic number.

172804281376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172804281376 is an abundant number, since it is smaller than the sum of its proper divisors (187416409244).

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

172804281376 is a wasteful number, since it uses less digits than its factorization.

172804281376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317654956 (or 317654948 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 172804281376 in words is "one hundred seventy-two billion, eight hundred four million, two hundred eighty-one thousand, three hundred seventy-six".