2309349785920 has 56 divisors (see below), whose sum is σ = 5541117439968. Its totient is φ = 916688448000.

The previous prime is 2309349785917. The next prime is 2309349785921. The reversal of 2309349785920 is 295879439032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2309349785921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27502806 + ... + 27586645.

Almost surely, 2^{2309349785920} is an apocalyptic number.

2309349785920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2309349785920 is an abundant number, since it is smaller than the sum of its proper divisors (3231767654048).

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

2309349785920 is a wasteful number, since it uses less digits than its factorization.

2309349785920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55089599 (or 55089589 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 2309349785920 in words is "two trillion, three hundred nine billion, three hundred forty-nine million, seven hundred eighty-five thousand, nine hundred twenty".