12198257890 has 128 divisors (see below), whose sum is σ = 28061429760. Its totient is φ = 3713817600.

The previous prime is 12198257881. The next prime is 12198257893. The reversal of 12198257890 is 9875289121.

It is not an unprimeable number, because it can be changed into a prime (12198257893) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5104816 + ... + 5107204.

It is an arithmetic number, because the mean of its divisors is an integer number (219229920).

Almost surely, 2^12198257890 is an apocalyptic number.

12198257890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12198257890 is an abundant number, since it is smaller than the sum of its proper divisors (15863171870).

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

12198257890 is a wasteful number, since it uses less digits than its factorization.

12198257890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628.

The product of its (nonzero) digits is 725760, while the sum is 52.

The spelling of 12198257890 in words is "twelve billion, one hundred ninety-eight million, two hundred fifty-seven thousand, eight hundred ninety".