172952389505 has 16 divisors (see below), whose sum is σ = 238898271360. Its totient is φ = 117742712832.

The previous prime is 172952389469. The next prime is 172952389567. The reversal of 172952389505 is 505983259271.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 172952389505 - 2²⁸ = 172683954049 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17770304 + ... + 17780033.

It is an arithmetic number, because the mean of its divisors is an integer number (14931141960).

Almost surely, 2^172952389505 is an apocalyptic number.

It is an amenable number.

172952389505 is a deficient number, since it is larger than the sum of its proper divisors (65945881855).

172952389505 is a wasteful number, since it uses less digits than its factorization.

172952389505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35550488.

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 172952389505 in words is "one hundred seventy-two billion, nine hundred fifty-two million, three hundred eighty-nine thousand, five hundred five".