309995064180 has 144 divisors (see below), whose sum is σ = 971347313664. Its totient is φ = 79941358080.

The previous prime is 309995064173. The next prime is 309995064193. The reversal of 309995064180 is 81460599903.

309995064180 is a `hidden beast` number, since 3 + 0 + 9 + 99 + 506 + 41 + 8 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 8055064 + ... + 8093456.

It is an arithmetic number, because the mean of its divisors is an integer number (6745467456).

Almost surely, 2^309995064180 is an apocalyptic number.

309995064180 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 309995064180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485673656832).

309995064180 is an abundant number, since it is smaller than the sum of its proper divisors (661352249484).

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

309995064180 is a wasteful number, since it uses less digits than its factorization.

309995064180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39886 (or 39881 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 309995064180 in words is "three hundred nine billion, nine hundred ninety-five million, sixty-four thousand, one hundred eighty".