1226361564 has 36 divisors (see below), whose sum is σ = 3234752976. Its totient is φ = 391013568.

The previous prime is 1226361557. The next prime is 1226361601. The reversal of 1226361564 is 4651636221.

1226361564 is a `hidden beast` number, since 1 + 2 + 2 + 636 + 15 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 739729 + ... + 741384.

Almost surely, 2^1226361564 is an apocalyptic number.

It is an amenable number.

1226361564 is an abundant number, since it is smaller than the sum of its proper divisors (2008391412).

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

1226361564 is a wasteful number, since it uses less digits than its factorization.

1226361564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481146 (or 1481141 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1226361564 is about 35019.4455124578. The cubic root of 1226361564 is about 1070.3837573028.

Adding to 1226361564 its reverse (4651636221), we get a palindrome (5877997785).

The spelling of 1226361564 in words is "one billion, two hundred twenty-six million, three hundred sixty-one thousand, five hundred sixty-four".