12457775305 has 8 divisors (see below), whose sum is σ = 14949937800. Its totient is φ = 9965815296.

The previous prime is 12457775293. The next prime is 12457775371. The reversal of 12457775305 is 50357775421.

It can be written as a sum of positive squares in 4 ways, for example, as 999571456 + 11458203849 = 31616^2 + 107043^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12457775305 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181531 + ... + 240559.

It is an arithmetic number, because the mean of its divisors is an integer number (1868742225).

Almost surely, 2^12457775305 is an apocalyptic number.

It is an amenable number.

12457775305 is a deficient number, since it is larger than the sum of its proper divisors (2492162495).

12457775305 is an equidigital number, since it uses as much as digits as its factorization.

12457775305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101243.

The product of its (nonzero) digits is 1029000, while the sum is 46.

The spelling of 12457775305 in words is "twelve billion, four hundred fifty-seven million, seven hundred seventy-five thousand, three hundred five".