1616723456 has 40 divisors (see below), whose sum is σ = 3253671960. Its totient is φ = 802510848.

The previous prime is 1616723441. The next prime is 1616723461. The reversal of 1616723456 is 6543276161.

It is a super-2 number, since 2×1616723456² = 5227589466361167872, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 59810 + ... + 82526.

It is an arithmetic number, because the mean of its divisors is an integer number (81341799).

Almost surely, 2^1616723456 is an apocalyptic number.

1616723456 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 1616723456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626835980).

1616723456 is an abundant number, since it is smaller than the sum of its proper divisors (1636948504).

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

1616723456 is an equidigital number, since it uses as much as digits as its factorization.

1616723456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22874 (or 22858 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 1616723456 is about 40208.4997979283. The cubic root of 1616723456 is about 1173.6679532300.

The spelling of 1616723456 in words is "one billion, six hundred sixteen million, seven hundred twenty-three thousand, four hundred fifty-six".