1623791616 has 48 divisors (see below), whose sum is σ = 4329070200. Its totient is φ = 541261824.

The previous prime is 1623791599. The next prime is 1623791627. The reversal of 1623791616 is 6161973261.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126001 + ... + 138288.

Almost surely, 2^1623791616 is an apocalyptic number.

1623791616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1623791616 is an abundant number, since it is smaller than the sum of its proper divisors (2705278584).

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

1623791616 is an equidigital number, since it uses as much as digits as its factorization.

1623791616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264314 (or 264294 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 1623791616 is about 40296.2977952069. The cubic root of 1623791616 is about 1175.3758546508.

The spelling of 1623791616 in words is "one billion, six hundred twenty-three million, seven hundred ninety-one thousand, six hundred sixteen".