12705837457 has 16 divisors (see below), whose sum is σ = 13014735552. Its totient is φ = 12401588160.

The previous prime is 12705837427. The next prime is 12705837493. The reversal of 12705837457 is 75473850721.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12705837457 - 2⁷ = 12705837329 is a prime.

It is a super-2 number, since 2×12705837457² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12705837457.

It is not an unprimeable number, because it can be changed into a prime (12705837427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2355918 + ... + 2361304.

It is an arithmetic number, because the mean of its divisors is an integer number (813420972).

Almost surely, 2^12705837457 is an apocalyptic number.

It is an amenable number.

12705837457 is a deficient number, since it is larger than the sum of its proper divisors (308898095).

12705837457 is a wasteful number, since it uses less digits than its factorization.

12705837457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 12705837457 in words is "twelve billion, seven hundred five million, eight hundred thirty-seven thousand, four hundred fifty-seven".