1226551576897 has 2 divisors, whose sum is σ = 1226551576898. Its totient is φ = 1226551576896.

The previous prime is 1226551576889. The next prime is 1226551576979. The reversal of 1226551576897 is 7986751556221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1094149472256 + 132402104641 = 1046016^2 + 363871^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226551576897 - 2³ = 1226551576889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226558576897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613275788448 + 613275788449.

It is an arithmetic number, because the mean of its divisors is an integer number (613275788449).

Almost surely, 2^{1226551576897} is an apocalyptic number.

It is an amenable number.

1226551576897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226551576897 is an equidigital number, since it uses as much as digits as its factorization.

1226551576897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504000, while the sum is 64.

The spelling of 1226551576897 in words is "one trillion, two hundred twenty-six billion, five hundred fifty-one million, five hundred seventy-six thousand, eight hundred ninety-seven".