172632478809 has 32 divisors (see below), whose sum is σ = 272032874496. Its totient is φ = 95293373760.

The previous prime is 172632478801. The next prime is 172632478817. The reversal of 172632478809 is 908874236271.

It is an interprime number because it is at equal distance from previous prime (172632478801) and next prime (172632478817).

It is not a de Polignac number, because 172632478809 - 2³ = 172632478801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172632478801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124564 + ... + 600650.

It is an arithmetic number, because the mean of its divisors is an integer number (8501027328).

Almost surely, 2^172632478809 is an apocalyptic number.

It is an amenable number.

172632478809 is a deficient number, since it is larger than the sum of its proper divisors (99400395687).

172632478809 is a wasteful number, since it uses less digits than its factorization.

172632478809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476685.

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 172632478809 in words is "one hundred seventy-two billion, six hundred thirty-two million, four hundred seventy-eight thousand, eight hundred nine".