12597170850 has 432 divisors, whose sum is σ = 40752391680. Its totient is φ = 2775168000.

The previous prime is 12597170821. The next prime is 12597170851. The reversal of 12597170850 is 5807179521.

12597170850 is a `hidden beast` number, since 1 + 2 + 597 + 1 + 7 + 0 + 8 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12597170796 and 12597170805.

It is not an unprimeable number, because it can be changed into a prime (12597170851) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 28694931 + ... + 28695369.

It is an arithmetic number, because the mean of its divisors is an integer number (94334240).

Almost surely, 2^12597170850 is an apocalyptic number.

12597170850 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 12597170850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20376195840).

12597170850 is an abundant number, since it is smaller than the sum of its proper divisors (28155220830).

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

12597170850 is a wasteful number, since it uses less digits than its factorization.

12597170850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The spelling of 12597170850 in words is "twelve billion, five hundred ninety-seven million, one hundred seventy thousand, eight hundred fifty".