309539321422672 has 160 divisors (see below), whose sum is σ = 671032263686400. Its totient is φ = 137139644006400.

The previous prime is 309539321422603. The next prime is 309539321422693. The reversal of 309539321422672 is 276224123935903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1125914604 + ... + 1126189492.

It is an arithmetic number, because the mean of its divisors is an integer number (4193951648040).

Almost surely, 2^{309539321422672} 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 309539321422672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335516131843200).

309539321422672 is an abundant number, since it is smaller than the sum of its proper divisors (361492942263728).

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

309539321422672 is a wasteful number, since it uses less digits than its factorization.

309539321422672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276005 (or 275999 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 58.

The spelling of 309539321422672 in words is "three hundred nine trillion, five hundred thirty-nine billion, three hundred twenty-one million, four hundred twenty-two thousand, six hundred seventy-two".