12385645890 has 32 divisors (see below), whose sum is σ = 29736806400. Its totient is φ = 3301588224.

The previous prime is 12385645807. The next prime is 12385645891. The reversal of 12385645890 is 9854658321.

It is a super-2 number, since 2×12385645890² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12385645891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3786 + ... + 157434.

It is an arithmetic number, because the mean of its divisors is an integer number (929275200).

Almost surely, 2^12385645890 is an apocalyptic number.

12385645890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12385645890 is an abundant number, since it is smaller than the sum of its proper divisors (17351160510).

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

12385645890 is a wasteful number, since it uses less digits than its factorization.

12385645890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156346.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 12385645890 in words is "twelve billion, three hundred eighty-five million, six hundred forty-five thousand, eight hundred ninety".