30195139860 has 144 divisors (see below), whose sum is σ = 94636563840. Its totient is φ = 7788668160.

The previous prime is 30195139831. The next prime is 30195139861. The reversal of 30195139860 is 6893159103.

30195139860 is a `hidden beast` number, since 30 + 19 + 513 + 98 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30195139861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 655051 + ... + 699629.

It is an arithmetic number, because the mean of its divisors is an integer number (657198360).

Almost surely, 2^30195139860 is an apocalyptic number.

30195139860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30195139860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47318281920).

30195139860 is an abundant number, since it is smaller than the sum of its proper divisors (64441423980).

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

30195139860 is a wasteful number, since it uses less digits than its factorization.

30195139860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44718 (or 44713 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

It can be divided in two parts, 30 and 195139860, that added together give a triangular number (195139890 = T₁₉₇₅₅).

The spelling of 30195139860 in words is "thirty billion, one hundred ninety-five million, one hundred thirty-nine thousand, eight hundred sixty".