12543377990 has 32 divisors (see below), whose sum is σ = 26525300256. Its totient is φ = 4210364160.

The previous prime is 12543377983. The next prime is 12543378017. The reversal of 12543377990 is 9977334521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4384367 + ... + 4387226.

It is an arithmetic number, because the mean of its divisors is an integer number (828915633).

Almost surely, 2^12543377990 is an apocalyptic number.

12543377990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12543377990 is an abundant number, since it is smaller than the sum of its proper divisors (13981922266).

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

12543377990 is a wasteful number, since it uses less digits than its factorization.

12543377990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8771624.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The spelling of 12543377990 in words is "twelve billion, five hundred forty-three million, three hundred seventy-seven thousand, nine hundred ninety".