31108242943890 has 64 divisors (see below), whose sum is σ = 94806073739520. Its totient is φ = 7110455529600.

The previous prime is 31108242943871. The next prime is 31108242943963. The reversal of 31108242943890 is 9834924280113.

31108242943890 is a `hidden beast` number, since 3 + 1 + 1 + 0 + 82 + 42 + 9 + 438 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8229692011 + ... + 8229695790.

It is an arithmetic number, because the mean of its divisors is an integer number (1481344902180).

Almost surely, 2^{31108242943890} is an apocalyptic number.

31108242943890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31108242943890 is an abundant number, since it is smaller than the sum of its proper divisors (63697830795630).

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

31108242943890 is a wasteful number, since it uses less digits than its factorization.

31108242943890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16459387824 (or 16459387818 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 31108242943890 in words is "thirty-one trillion, one hundred eight billion, two hundred forty-two million, nine hundred forty-three thousand, eight hundred ninety".