173681396001 has 9 divisors (see below), whose sum is σ = 250874933491. Its totient is φ = 115786763832.

The previous prime is 173681395999. The next prime is 173681396023. The reversal of 173681396001 is 100693186371.

The square root of 173681396001 is 416751.

It is a perfect power (a square), and thus also a powerful number.

173681396001 is a `hidden beast` number, since 1 + 7 + 3 + 6 + 8 + 1 + 39 + 600 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5479700625 + 168201695376 = 74025^2 + 410124^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 173681396001 - 2¹ = 173681395999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173681396501) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1180795 + ... + 1319711.

Almost surely, 2^173681396001 is an apocalyptic number.

173681396001 is the 416751-st square number.

173681396001 is the 208376-th centered octagonal number.

It is an amenable number.

173681396001 is a deficient number, since it is larger than the sum of its proper divisors (77193537490).

173681396001 is an frugal number, since it uses more digits than its factorization.

173681396001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277840 (or 138920 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 173681396001 in words is "one hundred seventy-three billion, six hundred eighty-one million, three hundred ninety-six thousand, one".