1225267344636 has 48 divisors (see below), whose sum is σ = 2905665154560. Its totient is φ = 401766837120.

The previous prime is 1225267344607. The next prime is 1225267344649. The reversal of 1225267344636 is 6364437625221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481705 + ... + 1637856.

It is an arithmetic number, because the mean of its divisors is an integer number (60534690720).

Almost surely, 2^{1225267344636} is an apocalyptic number.

It is an amenable number.

1225267344636 is an abundant number, since it is smaller than the sum of its proper divisors (1680397809924).

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

1225267344636 is a wasteful number, since it uses less digits than its factorization.

1225267344636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120354 (or 2120352 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 51.

The spelling of 1225267344636 in words is "one trillion, two hundred twenty-five billion, two hundred sixty-seven million, three hundred forty-four thousand, six hundred thirty-six".