31396519854 has 96 divisors (see below), whose sum is σ = 78800117760. Its totient is φ = 8849022336.

The previous prime is 31396519841. The next prime is 31396519873. The reversal of 31396519854 is 45891569313.

31396519854 is a `hidden beast` number, since 31 + 3 + 96 + 519 + 8 + 5 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31396519854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5189059 + ... + 5195105.

It is an arithmetic number, because the mean of its divisors is an integer number (820834560).

Almost surely, 2^31396519854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31396519854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39400058880).

31396519854 is an abundant number, since it is smaller than the sum of its proper divisors (47403597906).

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

31396519854 is a wasteful number, since it uses less digits than its factorization.

31396519854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6614 (or 6611 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The spelling of 31396519854 in words is "thirty-one billion, three hundred ninety-six million, five hundred nineteen thousand, eight hundred fifty-four".