31841378813 has 8 divisors (see below), whose sum is σ = 32078518080. Its totient is φ = 31604793120.

The previous prime is 31841378773. The next prime is 31841378819. The reversal of 31841378813 is 31887314813.

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 31841378813 - 2¹² = 31841374717 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 (31841378819) 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, 22568 + ... + 253361.

It is an arithmetic number, because the mean of its divisors is an integer number (4009814760).

Almost surely, 2^31841378813 is an apocalyptic number.

It is an amenable number.

31841378813 is a deficient number, since it is larger than the sum of its proper divisors (237139267).

31841378813 is a wasteful number, since it uses less digits than its factorization.

31841378813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276787.

The product of its digits is 387072, while the sum is 47.

The spelling of 31841378813 in words is "thirty-one billion, eight hundred forty-one million, three hundred seventy-eight thousand, eight hundred thirteen".