12517589450 has 12 divisors (see below), whose sum is σ = 23282716470. Its totient is φ = 5007035760.

The previous prime is 12517589353. The next prime is 12517589471. The reversal of 12517589450 is 5498571521.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10690112449 + 1827477001 = 103393^2 + 42749^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12517589395 and 12517589404.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125175845 + ... + 125175944.

Almost surely, 2^12517589450 is an apocalyptic number.

12517589450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12517589450 is a deficient number, since it is larger than the sum of its proper divisors (10765127020).

12517589450 is a wasteful number, since it uses less digits than its factorization.

12517589450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250351801 (or 250351796 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 47.

The spelling of 12517589450 in words is "twelve billion, five hundred seventeen million, five hundred eighty-nine thousand, four hundred fifty".