1222636523345 has 8 divisors (see below), whose sum is σ = 1477873053864. Its totient is φ = 970969734784.

The previous prime is 1222636523341. The next prime is 1222636523359. The reversal of 1222636523345 is 5433256362221.

It can be written as a sum of positive squares in 4 ways, for example, as 365501257489 + 857135265856 = 604567^2 + 925816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222636523345 - 2² = 1222636523341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222636523296 and 1222636523305.

It is not an unprimeable number, because it can be changed into a prime (1222636523341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892434734 + ... + 892436103.

It is an arithmetic number, because the mean of its divisors is an integer number (184734131733).

Almost surely, 2^{1222636523345} is an apocalyptic number.

It is an amenable number.

1222636523345 is a deficient number, since it is larger than the sum of its proper divisors (255236530519).

1222636523345 is a wasteful number, since it uses less digits than its factorization.

1222636523345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784870979.

The product of its digits is 1555200, while the sum is 44.

The spelling of 1222636523345 in words is "one trillion, two hundred twenty-two billion, six hundred thirty-six million, five hundred twenty-three thousand, three hundred forty-five".