172156339451 has 8 divisors (see below), whose sum is σ = 179699815680. Its totient is φ = 164617731432.

The previous prime is 172156339441. The next prime is 172156339493. The reversal of 172156339451 is 154933651271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172156339451 - 2²² = 172152145147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172156339396 and 172156339405.

It is not an unprimeable number, because it can be changed into a prime (172156339441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144685 + ... + 1286318.

It is an arithmetic number, because the mean of its divisors is an integer number (22462476960).

Almost surely, 2^172156339451 is an apocalyptic number.

172156339451 is a deficient number, since it is larger than the sum of its proper divisors (7543476229).

172156339451 is a wasteful number, since it uses less digits than its factorization.

172156339451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434105.

The product of its digits is 680400, while the sum is 47.

The spelling of 172156339451 in words is "one hundred seventy-two billion, one hundred fifty-six million, three hundred thirty-nine thousand, four hundred fifty-one".