1463644644 has 48 divisors (see below), whose sum is σ = 4257878016. Its totient is φ = 380167200.

The previous prime is 1463644607. The next prime is 1463644669. The reversal of 1463644644 is 4464463641.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1463644596 and 1463644605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791092 + ... + 792939.

It is an arithmetic number, because the mean of its divisors is an integer number (88705792).

Almost surely, 2^1463644644 is an apocalyptic number.

1463644644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1463644644 is an abundant number, since it is smaller than the sum of its proper divisors (2794233372).

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

1463644644 is a wasteful number, since it uses less digits than its factorization.

1463644644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584056 (or 1584054 counting only the distinct ones).

The product of its digits is 663552, while the sum is 42.

The square root of 1463644644 is about 38257.6089686745. The cubic root of 1463644644 is about 1135.3903950501.

The spelling of 1463644644 in words is "one billion, four hundred sixty-three million, six hundred forty-four thousand, six hundred forty-four".