1623265664 has 32 divisors (see below), whose sum is σ = 3374457840. Its totient is φ = 776343040.

The previous prime is 1623265663. The next prime is 1623265667. The reversal of 1623265664 is 4665623261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623265663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272747 + ... + 278634.

Almost surely, 2^1623265664 is an apocalyptic number.

It is an amenable number.

1623265664 is an abundant number, since it is smaller than the sum of its proper divisors (1751192176).

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

1623265664 is an equidigital number, since it uses as much as digits as its factorization.

1623265664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551418 (or 551406 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 1623265664 is about 40289.7712080870. The cubic root of 1623265664 is about 1175.2489381113.

The spelling of 1623265664 in words is "one billion, six hundred twenty-three million, two hundred sixty-five thousand, six hundred sixty-four".