12435559957 has 2 divisors, whose sum is σ = 12435559958. Its totient is φ = 12435559956.

The previous prime is 12435559951. The next prime is 12435560023. The reversal of 12435559957 is 75995553421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7287353956 + 5148206001 = 85366^2 + 71751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12435559957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12435559898 and 12435559907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12435559951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6217779978 + 6217779979.

It is an arithmetic number, because the mean of its divisors is an integer number (6217779979).

Almost surely, 2^12435559957 is an apocalyptic number.

It is an amenable number.

12435559957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12435559957 is an equidigital number, since it uses as much as digits as its factorization.

12435559957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505000, while the sum is 55.

The spelling of 12435559957 in words is "twelve billion, four hundred thirty-five million, five hundred fifty-nine thousand, nine hundred fifty-seven".