12500194458 has 16 divisors (see below), whose sum is σ = 25109563680. Its totient is φ = 4148535696.

The previous prime is 12500194457. The next prime is 12500194459. The reversal of 12500194458 is 85449100521.

It is an interprime number because it is at equal distance from previous prime (12500194457) and next prime (12500194459).

It is a super-2 number, since 2×12500194458² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12500194451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4547460 + ... + 4550207.

It is an arithmetic number, because the mean of its divisors is an integer number (1569347730).

Almost surely, 2^12500194458 is an apocalyptic number.

12500194458 is an abundant number, since it is smaller than the sum of its proper divisors (12609369222).

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

12500194458 is a wasteful number, since it uses less digits than its factorization.

12500194458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097901.

The product of its (nonzero) digits is 57600, while the sum is 39.

Adding to 12500194458 its reverse (85449100521), we get a palindrome (97949294979).

The spelling of 12500194458 in words is "twelve billion, five hundred million, one hundred ninety-four thousand, four hundred fifty-eight".