309077906085 has 192 divisors, whose sum is σ = 644709058560. Its totient is φ = 139493975040.

The previous prime is 309077906017. The next prime is 309077906089. The reversal of 309077906085 is 580609770903.

It is not a de Polignac number, because 309077906085 - 2²² = 309073711781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309077906089) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 19632337 + ... + 19648073.

It is an arithmetic number, because the mean of its divisors is an integer number (3357859680).

Almost surely, 2^309077906085 is an apocalyptic number.

It is an amenable number.

309077906085 is an abundant number, since it is smaller than the sum of its proper divisors (335631152475).

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

309077906085 is a wasteful number, since it uses less digits than its factorization.

309077906085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15833 (or 15808 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 309077906085 in words is "three hundred nine billion, seventy-seven million, nine hundred six thousand, eighty-five".