30977157888 has 162 divisors, whose sum is σ = 92750283444. Its totient is φ = 10325159424.

The previous prime is 30977157847. The next prime is 30977157899. The reversal of 30977157888 is 88875177903.

It is a tau number, because it is divible by the number of its divisors (162).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1670395 + ... + 1688837.

Almost surely, 2^30977157888 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 30977157888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46375141722).

30977157888 is an abundant number, since it is smaller than the sum of its proper divisors (61773125556).

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

30977157888 is an frugal number, since it uses more digits than its factorization.

30977157888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18483 (or 18448 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 63.

The spelling of 30977157888 in words is "thirty billion, nine hundred seventy-seven million, one hundred fifty-seven thousand, eight hundred eighty-eight".