31349331067878 has 24 divisors (see below), whose sum is σ = 67929398009928. Its totient is φ = 10448877428352.

The previous prime is 31349331067867. The next prime is 31349331067909. The reversal of 31349331067878 is 87876013394313.

It is a happy number.

31349331067878 is a `hidden beast` number, since 3 + 1 + 3 + 493 + 3 + 1 + 0 + 6 + 78 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74751276 + ... + 75169487.

It is an arithmetic number, because the mean of its divisors is an integer number (2830391583747).

Almost surely, 2^{31349331067878} is an apocalyptic number.

31349331067878 is an abundant number, since it is smaller than the sum of its proper divisors (36580066942050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31349331067878 is a wasteful number, since it uses less digits than its factorization.

31349331067878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149932388 (or 149932385 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 31349331067878 in words is "thirty-one trillion, three hundred forty-nine billion, three hundred thirty-one million, sixty-seven thousand, eight hundred seventy-eight".