30891278016 has 112 divisors (see below), whose sum is σ = 92059048800. Its totient is φ = 10155995136.

The previous prime is 30891277981. The next prime is 30891278029. The reversal of 30891278016 is 61087219803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3700 + ... + 248588.

Almost surely, 2^30891278016 is an apocalyptic number.

30891278016 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 30891278016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46029524400).

30891278016 is an abundant number, since it is smaller than the sum of its proper divisors (61167770784).

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

30891278016 is a wasteful number, since it uses less digits than its factorization.

30891278016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244983 (or 244967 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 30891278016 in words is "thirty billion, eight hundred ninety-one million, two hundred seventy-eight thousand, sixteen".