32991308957 has 4 divisors (see below), whose sum is σ = 32993752476. Its totient is φ = 32988865440.

The previous prime is 32991308953. The next prime is 32991308981. The reversal of 32991308957 is 75980319923.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75980319923 = 49727 ⋅1527949.

It can be written as a sum of positive squares in 2 ways, for example, as 24632046916 + 8359262041 = 156946^2 + 91429^2 .

It is a cyclic number.

It is not a de Polignac number, because 32991308957 - 2² = 32991308953 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 (32991308953) 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 3 ways as a sum of consecutive naturals, for example, 1201394 + ... + 1228547.

It is an arithmetic number, because the mean of its divisors is an integer number (8248438119).

Almost surely, 2^32991308957 is an apocalyptic number.

It is an amenable number.

32991308957 is a deficient number, since it is larger than the sum of its proper divisors (2443519).

32991308957 is a wasteful number, since it uses less digits than its factorization.

32991308957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443518.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 32991308957 in words is "thirty-two billion, nine hundred ninety-one million, three hundred eight thousand, nine hundred fifty-seven".