1616616243 has 24 divisors (see below), whose sum is σ = 2550562560. Its totient is φ = 978549360.

The previous prime is 1616616227. The next prime is 1616616251. The reversal of 1616616243 is 3426166161.

It is a happy number.

1616616243 is a `hidden beast` number, since 1 + 6 + 16 + 616 + 24 + 3 = 666.

1616616243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1616616243 - 2⁴ = 1616616227 is a prime.

It is a super-2 number, since 2×1616616243² = 5226896154262870098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616616198 and 1616616207.

It is not an unprimeable number, because it can be changed into a prime (1616616143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73330 + ... + 92792.

It is an arithmetic number, because the mean of its divisors is an integer number (106273440).

Almost surely, 2^1616616243 is an apocalyptic number.

1616616243 is a deficient number, since it is larger than the sum of its proper divisors (933946317).

1616616243 is a wasteful number, since it uses less digits than its factorization.

1616616243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20319 (or 20316 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1616616243 is about 40207.1665626913. The cubic root of 1616616243 is about 1173.6420087303.

The spelling of 1616616243 in words is "one billion, six hundred sixteen million, six hundred sixteen thousand, two hundred forty-three".