32256991369 has 2 divisors, whose sum is σ = 32256991370. Its totient is φ = 32256991368.

The previous prime is 32256991337. The next prime is 32256991457. The reversal of 32256991369 is 96319965223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32227430400 + 29560969 = 179520^2 + 5437^2 .

It is a cyclic number.

It is not a de Polignac number, because 32256991369 - 2⁵ = 32256991337 is a prime.

It is a super-2 number, since 2×32256991369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32256991469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16128495684 + 16128495685.

It is an arithmetic number, because the mean of its divisors is an integer number (16128495685).

Almost surely, 2^32256991369 is an apocalyptic number.

It is an amenable number.

32256991369 is a deficient number, since it is larger than the sum of its proper divisors (1).

32256991369 is an equidigital number, since it uses as much as digits as its factorization.

32256991369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4723920, while the sum is 55.

The spelling of 32256991369 in words is "thirty-two billion, two hundred fifty-six million, nine hundred ninety-one thousand, three hundred sixty-nine".