30640781500 has 96 divisors (see below), whose sum is σ = 76809672576. Its totient is φ = 10460044800.

The previous prime is 30640781497. The next prime is 30640781531. The reversal of 30640781500 is 518704603.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 796714 + ... + 834286.

It is an arithmetic number, because the mean of its divisors is an integer number (800100756).

Almost surely, 2^30640781500 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 30640781500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38404836288).

30640781500 is an abundant number, since it is smaller than the sum of its proper divisors (46168891076).

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

30640781500 is a wasteful number, since it uses less digits than its factorization.

30640781500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37832 (or 37820 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 30640781500 in words is "thirty billion, six hundred forty million, seven hundred eighty-one thousand, five hundred".