172324027661 has 16 divisors (see below), whose sum is σ = 181819205568. Its totient is φ = 163114560000.

The previous prime is 172324027639. The next prime is 172324027703. The reversal of 172324027661 is 166720423271.

It is a cyclic number.

It is not a de Polignac number, because 172324027661 - 2³⁰ = 171250285837 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172324027961) 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, 183581 + ... + 615101.

It is an arithmetic number, because the mean of its divisors is an integer number (11363700348).

Almost surely, 2^172324027661 is an apocalyptic number.

It is an amenable number.

172324027661 is a deficient number, since it is larger than the sum of its proper divisors (9495177907).

172324027661 is a wasteful number, since it uses less digits than its factorization.

172324027661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431852.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 172324027661 in words is "one hundred seventy-two billion, three hundred twenty-four million, twenty-seven thousand, six hundred sixty-one".