32664416261 has 4 divisors (see below), whose sum is σ = 33111874092. Its totient is φ = 32216958432.

The previous prime is 32664416251. The next prime is 32664416263. The reversal of 32664416261 is 16261446623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16261446623 = 1871 ⋅8691313.

It can be written as a sum of positive squares in 2 ways, for example, as 27678644161 + 4985772100 = 166369^2 + 70610^2 .

It is a cyclic number.

It is not a de Polignac number, because 32664416261 - 2²⁶ = 32597307397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32664416263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223728806 + ... + 223728951.

It is an arithmetic number, because the mean of its divisors is an integer number (8277968523).

Almost surely, 2^32664416261 is an apocalyptic number.

It is an amenable number.

32664416261 is a deficient number, since it is larger than the sum of its proper divisors (447457831).

32664416261 is an equidigital number, since it uses as much as digits as its factorization.

32664416261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447457830.

The product of its digits is 248832, while the sum is 41.

The spelling of 32664416261 in words is "thirty-two billion, six hundred sixty-four million, four hundred sixteen thousand, two hundred sixty-one".