1226649236825 has 12 divisors (see below), whose sum is σ = 1521245663808. Its totient is φ = 981189963600.

The previous prime is 1226649236821. The next prime is 1226649236861. The reversal of 1226649236825 is 5286329466221.

It is a happy number.

It is not a de Polignac number, because 1226649236825 - 2² = 1226649236821 is a prime.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226649236821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3042077 + ... + 3421626.

It is an arithmetic number, because the mean of its divisors is an integer number (126770471984).

Almost surely, 2^{1226649236825} is an apocalyptic number.

It is an amenable number.

1226649236825 is a deficient number, since it is larger than the sum of its proper divisors (294596426983).

1226649236825 is an equidigital number, since it uses as much as digits as its factorization.

1226649236825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471304 (or 6471299 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 56.

The spelling of 1226649236825 in words is "one trillion, two hundred twenty-six billion, six hundred forty-nine million, two hundred thirty-six thousand, eight hundred twenty-five".