30971774988 has 144 divisors (see below), whose sum is σ = 98377703424. Its totient is φ = 7981182720.

The previous prime is 30971774969. The next prime is 30971775031. The reversal of 30971774988 is 88947717903.

30971774988 is a `hidden beast` number, since 3 + 0 + 9 + 71 + 77 + 498 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308056 + ... + 396032.

It is an arithmetic number, because the mean of its divisors is an integer number (683178496).

Almost surely, 2^30971774988 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 30971774988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49188851712).

30971774988 is an abundant number, since it is smaller than the sum of its proper divisors (67405928436).

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

30971774988 is a wasteful number, since it uses less digits than its factorization.

30971774988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88132 (or 88127 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 30971774988 in words is "thirty billion, nine hundred seventy-one million, seven hundred seventy-four thousand, nine hundred eighty-eight".