12991486830 has 64 divisors (see below), whose sum is σ = 35949201408. Its totient is φ = 2943198720.

The previous prime is 12991486813. The next prime is 12991486831. The reversal of 12991486830 is 3868419921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12991486831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250006 + ... + 297465.

It is an arithmetic number, because the mean of its divisors is an integer number (561706272).

Almost surely, 2^12991486830 is an apocalyptic number.

12991486830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12991486830 is an abundant number, since it is smaller than the sum of its proper divisors (22957714578).

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

12991486830 is a wasteful number, since it uses less digits than its factorization.

12991486830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547601.

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 12991486830 in words is "twelve billion, nine hundred ninety-one million, four hundred eighty-six thousand, eight hundred thirty".