32161393969 has 2 divisors, whose sum is σ = 32161393970.
Its totient is φ = 32161393968.
The previous prime is 32161393967. The next prime is 32161393997. The reversal of 32161393969 is 96939316123.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 31298209569 + 863184400 = 176913^2 + 29380^2
It is a cyclic number.
It is not a de Polignac number, because 32161393969 - 21 = 32161393967 is a prime.
It is a super-2 number, since 2×321613939692 (a number of 22 digits) contains 22 as substring.
Together with 32161393967, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (32161393961) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080696984 + 16080696985.
It is an arithmetic number, because the mean of its divisors is an integer number (16080696985).
Almost surely, 232161393969 is an apocalyptic number.
It is an amenable number.
32161393969 is a deficient number, since it is larger than the sum of its proper divisors (1).
32161393969 is an equidigital number, since it uses as much as digits as its factorization.
32161393969 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1417176, while the sum is 52.
The spelling of 32161393969 in words is "thirty-two billion, one hundred sixty-one million, three hundred ninety-three thousand, nine hundred sixty-nine".