12435581957 has 8 divisors (see below), whose sum is σ = 13488235992. Its totient is φ = 11418611200.

The previous prime is 12435581941. The next prime is 12435581989. The reversal of 12435581957 is 75918553421.

It can be written as a sum of positive squares in 4 ways, for example, as 500237956 + 11935344001 = 22366^2 + 109249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12435581957 - 2⁴ = 12435581941 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 (12435583957) 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, 8920094 + ... + 8921487.

It is an arithmetic number, because the mean of its divisors is an integer number (1686029499).

Almost surely, 2^12435581957 is an apocalyptic number.

12435581957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12435581957 is a deficient number, since it is larger than the sum of its proper divisors (1052654035).

12435581957 is a wasteful number, since it uses less digits than its factorization.

12435581957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17841639.

The product of its digits is 1512000, while the sum is 50.

The spelling of 12435581957 in words is "twelve billion, four hundred thirty-five million, five hundred eighty-one thousand, nine hundred fifty-seven".