1616244445 has 4 divisors (see below), whose sum is σ = 1939493340. Its totient is φ = 1292995552.

The previous prime is 1616244439. The next prime is 1616244463. The reversal of 1616244445 is 5444426161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1122116004 + 494128441 = 33498^2 + 22229^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616244445 - 2⁷ = 1616244317 is a prime.

It is a super-2 number, since 2×1616244445² = 5224492211986716050, which contains 22 as substring.

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, 161624440 + ... + 161624449.

It is an arithmetic number, because the mean of its divisors is an integer number (484873335).

Almost surely, 2^1616244445 is an apocalyptic number.

It is an amenable number.

1616244445 is a deficient number, since it is larger than the sum of its proper divisors (323248895).

1616244445 is an equidigital number, since it uses as much as digits as its factorization.

1616244445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323248894.

The product of its digits is 92160, while the sum is 37.

The square root of 1616244445 is about 40202.5427678399. The cubic root of 1616244445 is about 1173.5520283552.

The spelling of 1616244445 in words is "one billion, six hundred sixteen million, two hundred forty-four thousand, four hundred forty-five".