31869194364 has 168 divisors, whose sum is σ = 101186372448. Its totient is φ = 8569774080.

The previous prime is 31869194363. The next prime is 31869194389. The reversal of 31869194364 is 46349196813.

31869194364 is a `hidden beast` number, since 31 + 8 + 69 + 194 + 364 = 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 31869194364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31869194363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 301084 + ... + 392924.

It is an arithmetic number, because the mean of its divisors is an integer number (602299836).

Almost surely, 2^31869194364 is an apocalyptic number.

31869194364 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31869194364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50593186224).

31869194364 is an abundant number, since it is smaller than the sum of its proper divisors (69317178084).

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

31869194364 is a wasteful number, since it uses less digits than its factorization.

31869194364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91887 (or 91870 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The spelling of 31869194364 in words is "thirty-one billion, eight hundred sixty-nine million, one hundred ninety-four thousand, three hundred sixty-four".