1224550656 has 144 divisors (see below), whose sum is σ = 4138691200. Its totient is φ = 349857792.

The previous prime is 1224550651. The next prime is 1224550669. The reversal of 1224550656 is 6560554221.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1224550656² = 2999048618220060672, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1224550656.

It is not an unprimeable number, because it can be changed into a prime (1224550651) 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, 35730 + ... + 61038.

Almost surely, 2^1224550656 is an apocalyptic number.

1224550656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224550656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069345600).

1224550656 is an abundant number, since it is smaller than the sum of its proper divisors (2914140544).

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

1224550656 is an equidigital number, since it uses as much as digits as its factorization.

1224550656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25341 (or 25321 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1224550656 is about 34993.5802112330. The cubic root of 1224550656 is about 1069.8566366867.

The spelling of 1224550656 in words is "one billion, two hundred twenty-four million, five hundred fifty thousand, six hundred fifty-six".