1226756553 has 16 divisors (see below), whose sum is σ = 1785450432. Its totient is φ = 743040000.

The previous prime is 1226756551. The next prime is 1226756563. The reversal of 1226756553 is 3556576221.

It is not a de Polignac number, because 1226756553 - 2¹ = 1226756551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1226756551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49113 + ... + 69753.

It is an arithmetic number, because the mean of its divisors is an integer number (111590652).

Almost surely, 2^1226756553 is an apocalyptic number.

It is an amenable number.

1226756553 is a deficient number, since it is larger than the sum of its proper divisors (558693879).

1226756553 is a wasteful number, since it uses less digits than its factorization.

1226756553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22456.

The product of its digits is 378000, while the sum is 42.

The square root of 1226756553 is about 35025.0846251654. The cubic root of 1226756553 is about 1070.4986620855.

The spelling of 1226756553 in words is "one billion, two hundred twenty-six million, seven hundred fifty-six thousand, five hundred fifty-three".