1266763756036 has 9 divisors (see below), whose sum is σ = 2216840512341. Its totient is φ = 633380752512.

The previous prime is 1266763755991. The next prime is 1266763756073. The reversal of 1266763756036 is 6306573676621.

It is a happy number.

The square root of 1266763756036 is 1125506.

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., 1237678500100 + 29085255936 = 1112510^2 + 170544^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1969636 + ... + 2532388.

Almost surely, 2^{1266763756036} is an apocalyptic number.

1266763756036 is the 1125506-th square number.

It is an amenable number.

1266763756036 is a deficient number, since it is larger than the sum of its proper divisors (950076756305).

1266763756036 is an frugal number, since it uses more digits than its factorization.

1266763756036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125510 (or 562755 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 58.

The spelling of 1266763756036 in words is "one trillion, two hundred sixty-six billion, seven hundred sixty-three million, seven hundred fifty-six thousand, thirty-six".