12416742557 has 4 divisors (see below), whose sum is σ = 13147139196. Its totient is φ = 11686345920.

The previous prime is 12416742553. The next prime is 12416742571. The reversal of 12416742557 is 75524761421.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6403360441 + 6013382116 = 80021^2 + 77546^2 .

It is a cyclic number.

It is not a de Polignac number, because 12416742557 - 2² = 12416742553 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 (12416742553) 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, 365198294 + ... + 365198327.

It is an arithmetic number, because the mean of its divisors is an integer number (3286784799).

Almost surely, 2^12416742557 is an apocalyptic number.

12416742557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12416742557 is a deficient number, since it is larger than the sum of its proper divisors (730396639).

12416742557 is an equidigital number, since it uses as much as digits as its factorization.

12416742557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730396638.

The product of its digits is 470400, while the sum is 44.

The spelling of 12416742557 in words is "twelve billion, four hundred sixteen million, seven hundred forty-two thousand, five hundred fifty-seven".