309143053872 has 100 divisors (see below), whose sum is σ = 896387482936. Its totient is φ = 102859061760.

The previous prime is 309143053861. The next prime is 309143053873. The reversal of 309143053872 is 278350341903.

309143053872 is a `hidden beast` number, since 3 + 0 + 9 + 1 + 43 + 0 + 538 + 72 = 666.

309143053872 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (309143053873) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 490872 + ... + 926952.

Almost surely, 2^309143053872 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 309143053872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448193741468).

309143053872 is an abundant number, since it is smaller than the sum of its proper divisors (587244429064).

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

309143053872 is a wasteful number, since it uses less digits than its factorization.

309143053872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436648 (or 436633 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 309143053872 in words is "three hundred nine billion, one hundred forty-three million, fifty-three thousand, eight hundred seventy-two".