31454839872 has 168 divisors, whose sum is σ = 97113404960. Its totient is φ = 9701959680.

The previous prime is 31454839847. The next prime is 31454839873. The reversal of 31454839872 is 27893845413.

It is a happy number.

31454839872 is a `hidden beast` number, since 3 + 1 + 4 + 5 + 483 + 98 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (31454839873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 437172 + ... + 504012.

Almost surely, 2^31454839872 is an apocalyptic number.

31454839872 is a gapful number since it is divisible by the number (32) 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 31454839872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48556702480).

31454839872 is an abundant number, since it is smaller than the sum of its proper divisors (65658565088).

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

31454839872 is a wasteful number, since it uses less digits than its factorization.

31454839872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66921 (or 66908 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 31454839872 in words is "thirty-one billion, four hundred fifty-four million, eight hundred thirty-nine thousand, eight hundred seventy-two".