31677391841 has 4 divisors (see below), whose sum is σ = 31680340884. Its totient is φ = 31674442800.

The previous prime is 31677391817. The next prime is 31677391981. The reversal of 31677391841 is 14819377613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14819377613 = 23539 ⋅629567.

It can be written as a sum of positive squares in 2 ways, for example, as 22398115600 + 9279276241 = 149660^2 + 96329^2 .

It is a cyclic number.

It is not a de Polignac number, because 31677391841 - 2⁶ = 31677391777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31677391841.

It is not an unprimeable number, because it can be changed into a prime (31677391241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458350 + ... + 1479911.

It is an arithmetic number, because the mean of its divisors is an integer number (7920085221).

Almost surely, 2^31677391841 is an apocalyptic number.

It is an amenable number.

31677391841 is a deficient number, since it is larger than the sum of its proper divisors (2949043).

31677391841 is a wasteful number, since it uses less digits than its factorization.

31677391841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949042.

The product of its digits is 762048, while the sum is 50.

The spelling of 31677391841 in words is "thirty-one billion, six hundred seventy-seven million, three hundred ninety-one thousand, eight hundred forty-one".