356553132221661 has 16 divisors (see below), whose sum is σ = 476146500263616. Its totient is φ = 237330930779136.

The previous prime is 356553132221659. The next prime is 356553132221719. The reversal of 356553132221661 is 166122231355653.

It is not a de Polignac number, because 356553132221661 - 2¹ = 356553132221659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356553132221861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370607101 + ... + 371567933.

It is an arithmetic number, because the mean of its divisors is an integer number (29759156266476).

Almost surely, 2^{356553132221661} is an apocalyptic number.

It is an amenable number.

356553132221661 is a deficient number, since it is larger than the sum of its proper divisors (119593368041955).

356553132221661 is a wasteful number, since it uses less digits than its factorization.

356553132221661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153852.

The product of its digits is 5832000, while the sum is 51.

The spelling of 356553132221661 in words is "three hundred fifty-six trillion, five hundred fifty-three billion, one hundred thirty-two million, two hundred twenty-one thousand, six hundred sixty-one".