31868774637721 has 8 divisors (see below), whose sum is σ = 36775063105664. Its totient is φ = 27050887764000.

The previous prime is 31868774637677. The next prime is 31868774637731. The reversal of 31868774637721 is 12773647786813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31868774637721 - 2⁹ = 31868774637209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31868774637731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22100397780 + ... + 22100399221.

It is an arithmetic number, because the mean of its divisors is an integer number (4596882888208).

Almost surely, 2^{31868774637721} is an apocalyptic number.

It is an amenable number.

31868774637721 is a deficient number, since it is larger than the sum of its proper divisors (4906288467943).

31868774637721 is a wasteful number, since it uses less digits than its factorization.

31868774637721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44200797111.

The product of its digits is 398297088, while the sum is 70.

The spelling of 31868774637721 in words is "thirty-one trillion, eight hundred sixty-eight billion, seven hundred seventy-four million, six hundred thirty-seven thousand, seven hundred twenty-one".