172152782827 has 16 divisors (see below), whose sum is σ = 178645519360. Its totient is φ = 165775159872.

The previous prime is 172152782729. The next prime is 172152782863. The reversal of 172152782827 is 728287251271.

It is a cyclic number.

It is not a de Polignac number, because 172152782827 - 2⁷ = 172152782699 is a prime.

It is a super-2 number, since 2×172152782827² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172152782027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8298574 + ... + 8319292.

It is an arithmetic number, because the mean of its divisors is an integer number (11165344960).

Almost surely, 2^172152782827 is an apocalyptic number.

172152782827 is a deficient number, since it is larger than the sum of its proper divisors (6492736533).

172152782827 is a wasteful number, since it uses less digits than its factorization.

172152782827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23482.

The product of its digits is 1756160, while the sum is 52.

The spelling of 172152782827 in words is "one hundred seventy-two billion, one hundred fifty-two million, seven hundred eighty-two thousand, eight hundred twenty-seven".