1246911246689 has 4 divisors (see below), whose sum is σ = 1289908186260. Its totient is φ = 1203914307120.

The previous prime is 1246911246677. The next prime is 1246911246709. The reversal of 1246911246689 is 9866421196421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 619710605089 + 627200641600 = 787217^2 + 791960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246911246689 - 2²⁰ = 1246910198113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1246911246089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21498469742 + ... + 21498469799.

It is an arithmetic number, because the mean of its divisors is an integer number (322477046565).

Almost surely, 2^{1246911246689} is an apocalyptic number.

It is an amenable number.

1246911246689 is a deficient number, since it is larger than the sum of its proper divisors (42996939571).

1246911246689 is an equidigital number, since it uses as much as digits as its factorization.

1246911246689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42996939570.

The product of its digits is 8957952, while the sum is 59.

The spelling of 1246911246689 in words is "one trillion, two hundred forty-six billion, nine hundred eleven million, two hundred forty-six thousand, six hundred eighty-nine".