31845357684 has 240 divisors, whose sum is σ = 97116450816. Its totient is φ = 8911296000.

The previous prime is 31845357673. The next prime is 31845357689. The reversal of 31845357684 is 48675354813.

31845357684 is a `hidden beast` number, since 3 + 18 + 4 + 53 + 576 + 8 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31845357684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31845357689) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 52986984 + ... + 52987584.

Almost surely, 2^31845357684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31845357684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48558225408).

31845357684 is an abundant number, since it is smaller than the sum of its proper divisors (65271093132).

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

31845357684 is a wasteful number, since it uses less digits than its factorization.

31845357684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1057 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 31845357684 in words is "thirty-one billion, eight hundred forty-five million, three hundred fifty-seven thousand, six hundred eighty-four".