12657461906 has 8 divisors (see below), whose sum is σ = 19181927100. Its totient is φ = 6263486208.

The previous prime is 12657461893. The next prime is 12657461939. The reversal of 12657461906 is 60916475621.

It can be written as a sum of positive squares in 2 ways, for example, as 12146023681 + 511438225 = 110209^2 + 22615^2 .

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

It is a super-2 number, since 2×12657461906² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32622131 + ... + 32622518.

Almost surely, 2^12657461906 is an apocalyptic number.

12657461906 is a deficient number, since it is larger than the sum of its proper divisors (6524465194).

12657461906 is an equidigital number, since it uses as much as digits as its factorization.

12657461906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65244748.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 12657461906 in words is "twelve billion, six hundred fifty-seven million, four hundred sixty-one thousand, nine hundred six".