12500081850 has 96 divisors (see below), whose sum is σ = 32131693440. Its totient is φ = 3213354240.

The previous prime is 12500081821. The next prime is 12500081879. The reversal of 12500081850 is 5818000521.

It is an interprime number because it is at equal distance from previous prime (12500081821) and next prime (12500081879).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 594619 + ... + 615281.

It is an arithmetic number, because the mean of its divisors is an integer number (334705140).

Almost surely, 2^12500081850 is an apocalyptic number.

12500081850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12500081850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16065846720).

12500081850 is an abundant number, since it is smaller than the sum of its proper divisors (19631611590).

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

12500081850 is a wasteful number, since it uses less digits than its factorization.

12500081850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20824 (or 20819 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The spelling of 12500081850 in words is "twelve billion, five hundred million, eighty-one thousand, eight hundred fifty".