12651163450 has 12 divisors (see below), whose sum is σ = 23531164110. Its totient is φ = 5060465360.

The previous prime is 12651163423. The next prime is 12651163523. The reversal of 12651163450 is 5436115621.

It can be written as a sum of positive squares in 3 ways, for example, as 8758526569 + 3892636881 = 93587^2 + 62391^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126511585 + ... + 126511684.

Almost surely, 2^12651163450 is an apocalyptic number.

12651163450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12651163450 is a deficient number, since it is larger than the sum of its proper divisors (10880000660).

12651163450 is a wasteful number, since it uses less digits than its factorization.

12651163450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253023281 (or 253023276 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 12651163450 in words is "twelve billion, six hundred fifty-one million, one hundred sixty-three thousand, four hundred fifty".