30139261866 has 96 divisors (see below), whose sum is σ = 77642336640. Its totient is φ = 8489396160.

The previous prime is 30139261849. The next prime is 30139261891. The reversal of 30139261866 is 66816293103.

30139261866 is a `hidden beast` number, since 301 + 3 + 9 + 261 + 86 + 6 = 666.

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, 1897590 + ... + 1913406.

It is an arithmetic number, because the mean of its divisors is an integer number (808774340).

Almost surely, 2^30139261866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30139261866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38821168320).

30139261866 is an abundant number, since it is smaller than the sum of its proper divisors (47503074774).

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

30139261866 is a wasteful number, since it uses less digits than its factorization.

30139261866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15977 (or 15900 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 30139261866 in words is "thirty billion, one hundred thirty-nine million, two hundred sixty-one thousand, eight hundred sixty-six".