12505102450 has 12 divisors (see below), whose sum is σ = 23259490650. Its totient is φ = 5002040960.

The previous prime is 12505102427. The next prime is 12505102457. The reversal of 12505102450 is 5420150521.

It can be written as a sum of positive squares in 3 ways, for example, as 9934308241 + 2570794209 = 99671^2 + 50703^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12505102457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125050975 + ... + 125051074.

Almost surely, 2^12505102450 is an apocalyptic number.

12505102450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12505102450 is a deficient number, since it is larger than the sum of its proper divisors (10754388200).

12505102450 is a wasteful number, since it uses less digits than its factorization.

12505102450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250102061 (or 250102056 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 12505102450 its reverse (5420150521), we get a palindrome (17925252971).

The spelling of 12505102450 in words is "twelve billion, five hundred five million, one hundred two thousand, four hundred fifty".