309609838944 has 192 divisors, whose sum is σ = 1036665262080. Its totient is φ = 88062888960.

The previous prime is 309609838921. The next prime is 309609838957. The reversal of 309609838944 is 449838906903.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 1233924 + ... + 1463484.

It is an arithmetic number, because the mean of its divisors is an integer number (5399298240).

Almost surely, 2^309609838944 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 309609838944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518332631040).

309609838944 is an abundant number, since it is smaller than the sum of its proper divisors (727055423136).

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

309609838944 is a wasteful number, since it uses less digits than its factorization.

309609838944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229810 (or 229796 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 63.

The spelling of 309609838944 in words is "three hundred nine billion, six hundred nine million, eight hundred thirty-eight thousand, nine hundred forty-four".