126651266650 has 12 divisors (see below), whose sum is σ = 235571356062. Its totient is φ = 50660506640.

The previous prime is 126651266639. The next prime is 126651266669. The reversal of 126651266650 is 56662156621.

It can be written as a sum of positive squares in 3 ways, for example, as 55136205721 + 71515060929 = 234811^2 + 267423^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 126651266650.

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, 1266512617 + ... + 1266512716.

Almost surely, 2^126651266650 is an apocalyptic number.

126651266650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126651266650 is a deficient number, since it is larger than the sum of its proper divisors (108920089412).

126651266650 is a wasteful number, since it uses less digits than its factorization.

126651266650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533025345 (or 2533025340 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 126651266650 in words is "one hundred twenty-six billion, six hundred fifty-one million, two hundred sixty-six thousand, six hundred fifty".