30983129856 has 504 divisors, whose sum is σ = 109005816864. Its totient is φ = 8599633920.

The previous prime is 30983129839. The next prime is 30983129861. The reversal of 30983129856 is 65892138903.

It is a tau number, because it is divible by the number of its divisors (504).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 48335296 + ... + 48335936.

Almost surely, 2^30983129856 is an apocalyptic number.

30983129856 is a gapful number since it is divisible by the number (36) 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 30983129856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54502908432).

30983129856 is an abundant number, since it is smaller than the sum of its proper divisors (78022687008).

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

30983129856 is an frugal number, since it uses more digits than its factorization.

30983129856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 30983129856 in words is "thirty billion, nine hundred eighty-three million, one hundred twenty-nine thousand, eight hundred fifty-six".