32621231355661 has 4 divisors (see below), whose sum is σ = 35130556844572. Its totient is φ = 30111905866752.

The previous prime is 32621231355637. The next prime is 32621231355673. The reversal of 32621231355661 is 16655313212623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15906584749636 + 16714646606025 = 3988306^2 + 4088355^2 .

It is a cyclic number.

It is not a de Polignac number, because 32621231355661 - 2²¹ = 32621229258509 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 (32621231355161) 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, 1254662744436 + ... + 1254662744461.

It is an arithmetic number, because the mean of its divisors is an integer number (8782639211143).

Almost surely, 2^{32621231355661} is an apocalyptic number.

It is an amenable number.

32621231355661 is a deficient number, since it is larger than the sum of its proper divisors (2509325488911).

32621231355661 is a wasteful number, since it uses less digits than its factorization.

32621231355661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509325488910.

The product of its digits is 1166400, while the sum is 46.

The spelling of 32621231355661 in words is "thirty-two trillion, six hundred twenty-one billion, two hundred thirty-one million, three hundred fifty-five thousand, six hundred sixty-one".