172135382788 has 24 divisors (see below), whose sum is σ = 302395681952. Its totient is φ = 85736807424.

The previous prime is 172135382779. The next prime is 172135382789. The reversal of 172135382788 is 887283531271.

It is not an unprimeable number, because it can be changed into a prime (172135382789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3891331 + ... + 3935317.

Almost surely, 2^172135382788 is an apocalyptic number.

It is an amenable number.

172135382788 is a deficient number, since it is larger than the sum of its proper divisors (130260299164).

172135382788 is a wasteful number, since it uses less digits than its factorization.

172135382788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47731 (or 47729 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The spelling of 172135382788 in words is "one hundred seventy-two billion, one hundred thirty-five million, three hundred eighty-two thousand, seven hundred eighty-eight".