31665846601 has 3 divisors (see below), whose sum is σ = 31666024551. Its totient is φ = 31665668652.

The previous prime is 31665846577. The next prime is 31665846629. The reversal of 31665846601 is 10664856613.

The square root of 31665846601 is 177949.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 22530310201 + 9135536400 = 150101^2 + 95580^2 .

It is not a de Polignac number, because 31665846601 - 2⁹ = 31665846089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31665846631) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 88975 + ... + 266923.

It is an arithmetic number, because the mean of its divisors is an integer number (10555341517).

Almost surely, 2^31665846601 is an apocalyptic number.

31665846601 is the 177949-th square number.

31665846601 is the 88975-th centered octagonal number.

It is an amenable number.

31665846601 is a deficient number, since it is larger than the sum of its proper divisors (177950).

31665846601 is an frugal number, since it uses more digits than its factorization.

31665846601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355898 (or 177949 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 31665846601 in words is "thirty-one billion, six hundred sixty-five million, eight hundred forty-six thousand, six hundred one".