1226632653 has 24 divisors (see below), whose sum is σ = 1844021088. Its totient is φ = 814819824.

The previous prime is 1226632643. The next prime is 1226632661. The reversal of 1226632653 is 3562366221.

1226632653 is a `hidden beast` number, since 12 + 2 + 6 + 632 + 6 + 5 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1226632653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226632643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59851 + ... + 77687.

It is an arithmetic number, because the mean of its divisors is an integer number (76834212).

Almost surely, 2^1226632653 is an apocalyptic number.

It is an amenable number.

1226632653 is a deficient number, since it is larger than the sum of its proper divisors (617388435).

1226632653 is an equidigital number, since it uses as much as digits as its factorization.

1226632653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18135 (or 18123 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 1226632653 is about 35023.3158481604. The cubic root of 1226632653 is about 1070.4626214520.

Adding to 1226632653 its reverse (3562366221), we get a palindrome (4788998874).

It can be divided in two parts, 122663 and 2653, that added together give a square (125316 = 354²).

The spelling of 1226632653 in words is "one billion, two hundred twenty-six million, six hundred thirty-two thousand, six hundred fifty-three".