32091799477 has 2 divisors, whose sum is σ = 32091799478. Its totient is φ = 32091799476.

The previous prime is 32091799433. The next prime is 32091799573. The reversal of 32091799477 is 77499719023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16426523556 + 15665275921 = 128166^2 + 125161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32091799477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32091799177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16045899738 + 16045899739.

It is an arithmetic number, because the mean of its divisors is an integer number (16045899739).

Almost surely, 2^32091799477 is an apocalyptic number.

It is an amenable number.

32091799477 is a deficient number, since it is larger than the sum of its proper divisors (1).

32091799477 is an equidigital number, since it uses as much as digits as its factorization.

32091799477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6001128, while the sum is 58.

The spelling of 32091799477 in words is "thirty-two billion, ninety-one million, seven hundred ninety-nine thousand, four hundred seventy-seven".