172887445730 has 32 divisors (see below), whose sum is σ = 314877579120. Its totient is φ = 68338068480.

The previous prime is 172887445727. The next prime is 172887445751. The reversal of 172887445730 is 37544788271.

It can be written as a sum of positive squares in 8 ways, for example, as 472323289 + 172415122441 = 21733^2 + 415229^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1493702 + ... + 1605278.

Almost surely, 2^172887445730 is an apocalyptic number.

172887445730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172887445730 is a deficient number, since it is larger than the sum of its proper divisors (141990133390).

172887445730 is a wasteful number, since it uses less digits than its factorization.

172887445730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113414.

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 172887445730 in words is "one hundred seventy-two billion, eight hundred eighty-seven million, four hundred forty-five thousand, seven hundred thirty".