172065558401 has 8 divisors (see below), whose sum is σ = 187982718624. Its totient is φ = 156194204320.

The previous prime is 172065558347. The next prime is 172065558407. The reversal of 172065558401 is 104855560271.

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

It is not a de Polignac number, because 172065558401 - 2³⁰ = 170991816577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172065558407) 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, 11443676 + ... + 11458701.

It is an arithmetic number, because the mean of its divisors is an integer number (23497839828).

Almost surely, 2^172065558401 is an apocalyptic number.

172065558401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172065558401 is a deficient number, since it is larger than the sum of its proper divisors (15917160223).

172065558401 is a wasteful number, since it uses less digits than its factorization.

172065558401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22903071.

The product of its (nonzero) digits is 336000, while the sum is 44.

The spelling of 172065558401 in words is "one hundred seventy-two billion, sixty-five million, five hundred fifty-eight thousand, four hundred one".