12446642501 has 4 divisors (see below), whose sum is σ = 12875837100. Its totient is φ = 12017447904.

The previous prime is 12446642489. The next prime is 12446642513. The reversal of 12446642501 is 10524664421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12446642489) and next prime (12446642513).

It can be written as a sum of positive squares in 2 ways, for example, as 5076420001 + 7370222500 = 71249^2 + 85850^2 .

It is a cyclic number.

It is not a de Polignac number, because 12446642501 - 2²² = 12442448197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12446642521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214597256 + ... + 214597313.

It is an arithmetic number, because the mean of its divisors is an integer number (3218959275).

Almost surely, 2^12446642501 is an apocalyptic number.

It is an amenable number.

12446642501 is a deficient number, since it is larger than the sum of its proper divisors (429194599).

12446642501 is an equidigital number, since it uses as much as digits as its factorization.

12446642501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429194598.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 12446642501 in words is "twelve billion, four hundred forty-six million, six hundred forty-two thousand, five hundred one".