30191779068 has 48 divisors (see below), whose sum is σ = 81372501504. Its totient is φ = 8610845440.

The previous prime is 30191779049. The next prime is 30191779069. The reversal of 30191779068 is 86097719103.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 30191779068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30191779069) 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, 6724980 + ... + 6729467.

It is an arithmetic number, because the mean of its divisors is an integer number (1695260448).

Almost surely, 2^30191779068 is an apocalyptic number.

It is an amenable number.

30191779068 is an abundant number, since it is smaller than the sum of its proper divisors (51180722436).

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

30191779068 is a wasteful number, since it uses less digits than its factorization.

30191779068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13454482 (or 13454480 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The spelling of 30191779068 in words is "thirty billion, one hundred ninety-one million, seven hundred seventy-nine thousand, sixty-eight".