31641813671297 has 4 divisors (see below), whose sum is σ = 32114079547056. Its totient is φ = 31169547795540.

The previous prime is 31641813671287. The next prime is 31641813671309. The reversal of 31641813671297 is 79217631814613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31641813671297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31641813671287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236132937779 + ... + 236132937912.

It is an arithmetic number, because the mean of its divisors is an integer number (8028519886764).

Almost surely, 2^{31641813671297} is an apocalyptic number.

It is an amenable number.

31641813671297 is a deficient number, since it is larger than the sum of its proper divisors (472265875759).

31641813671297 is an equidigital number, since it uses as much as digits as its factorization.

31641813671297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472265875758.

The product of its digits is 9144576, while the sum is 59.

The spelling of 31641813671297 in words is "thirty-one trillion, six hundred forty-one billion, eight hundred thirteen million, six hundred seventy-one thousand, two hundred ninety-seven".