31878368258 has 16 divisors (see below), whose sum is σ = 52793094816. Its totient is φ = 14315586240.

The previous prime is 31878368239. The next prime is 31878368279. The reversal of 31878368258 is 85286387813.

It is a junction number, because it is equal to n+sod(n) for n = 31878368197 and 31878368206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8727191 + ... + 8730842.

It is an arithmetic number, because the mean of its divisors is an integer number (3299568426).

Almost surely, 2^31878368258 is an apocalyptic number.

31878368258 is a deficient number, since it is larger than the sum of its proper divisors (20914726558).

31878368258 is a wasteful number, since it uses less digits than its factorization.

31878368258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17458129.

The product of its digits is 15482880, while the sum is 59.

The spelling of 31878368258 in words is "thirty-one billion, eight hundred seventy-eight million, three hundred sixty-eight thousand, two hundred fifty-eight".