126609001280 has 56 divisors (see below), whose sum is σ = 301593263208. Its totient is φ = 50625865728.

The previous prime is 126609001237. The next prime is 126609001283. The reversal of 126609001280 is 82100906621.

It can be written as a sum of positive squares in 4 ways, for example, as 86982525184 + 39626476096 = 294928^2 + 199064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 126609001280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126609001283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865622 + ... + 1001258.

Almost surely, 2^126609001280 is an apocalyptic number.

126609001280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126609001280 is an abundant number, since it is smaller than the sum of its proper divisors (174984261928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126609001280 is a wasteful number, since it uses less digits than its factorization.

126609001280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138571 (or 138561 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 126609001280 in words is "one hundred twenty-six billion, six hundred nine million, one thousand, two hundred eighty".