1280636249104 has 15 divisors (see below), whose sum is σ = 2481241502973. Its totient is φ = 640315861248.

The previous prime is 1280636249069. The next prime is 1280636249107. The reversal of 1280636249104 is 4019426360821.

The square root of 1280636249104 is 1131652.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1188492432400 + 92143816704 = 1090180^2 + 303552^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280636249107) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4385152 + ... + 4668064.

Almost surely, 2^{1280636249104} is an apocalyptic number.

1280636249104 is the 1131652-nd square number.

It is an amenable number.

1280636249104 is a deficient number, since it is larger than the sum of its proper divisors (1200605253869).

1280636249104 is an frugal number, since it uses more digits than its factorization.

1280636249104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565834 (or 282915 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 1280636249104 in words is "one trillion, two hundred eighty billion, six hundred thirty-six million, two hundred forty-nine thousand, one hundred four".