309113459640 has 192 divisors, whose sum is σ = 1026924687360. Its totient is φ = 80603216640.

The previous prime is 309113459639. The next prime is 309113459653. The reversal of 309113459640 is 46954311903.

309113459640 is a `hidden beast` number, since 3 + 0 + 9 + 1 + 13 + 4 + 596 + 40 = 666.

309113459640 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×309113459640² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20076345 + ... + 20091735.

It is an arithmetic number, because the mean of its divisors is an integer number (5348566080).

Almost surely, 2^309113459640 is an apocalyptic number.

309113459640 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 309113459640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513462343680).

309113459640 is an abundant number, since it is smaller than the sum of its proper divisors (717811227720).

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

309113459640 is a wasteful number, since it uses less digits than its factorization.

309113459640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16642 (or 16635 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 309113459640 in words is "three hundred nine billion, one hundred thirteen million, four hundred fifty-nine thousand, six hundred forty".