1223663632440 has 64 divisors (see below), whose sum is σ = 3689625440160. Its totient is φ = 324653898240.

The previous prime is 1223663632417. The next prime is 1223663632447. The reversal of 1223663632440 is 442363663221.

It is a junction number, because it is equal to n+sod(n) for n = 1223663632392 and 1223663632401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223663632447) 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, 25857571 + ... + 25904850.

Almost surely, 2^{1223663632440} is an apocalyptic number.

1223663632440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223663632440 is an abundant number, since it is smaller than the sum of its proper divisors (2465961807720).

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

1223663632440 is a wasteful number, since it uses less digits than its factorization.

1223663632440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51762632 (or 51762628 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 1223663632440 in words is "one trillion, two hundred twenty-three billion, six hundred sixty-three million, six hundred thirty-two thousand, four hundred forty".