30805091856 has 900 divisors, whose sum is σ = 120570043440. Its totient is φ = 7544275200.

The previous prime is 30805091831. The next prime is 30805091869. The reversal of 30805091856 is 65819050803.

30805091856 is a `hidden beast` number, since 3 + 0 + 80 + 509 + 18 + 56 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 145995591 + ... + 145995801.

Almost surely, 2^30805091856 is an apocalyptic number.

30805091856 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 30805091856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60285021720).

30805091856 is an abundant number, since it is smaller than the sum of its proper divisors (89764951584).

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

30805091856 is a wasteful number, since it uses less digits than its factorization.

30805091856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 30805091856 in words is "thirty billion, eight hundred five million, ninety-one thousand, eight hundred fifty-six".