30998625680 has 80 divisors (see below), whose sum is σ = 78692356224. Its totient is φ = 11262397440.

The previous prime is 30998625667. The next prime is 30998625689. The reversal of 30998625680 is 8652689903.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (30998625689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035077 + ... + 1064603.

Almost surely, 2^30998625680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30998625680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39346178112).

30998625680 is an abundant number, since it is smaller than the sum of its proper divisors (47693730544).

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

30998625680 is a wasteful number, since it uses less digits than its factorization.

30998625680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30744 (or 30738 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 30998625680 in words is "thirty billion, nine hundred ninety-eight million, six hundred twenty-five thousand, six hundred eighty".