616263809 has 4 divisors (see below), whose sum is σ = 704301504. Its totient is φ = 528226116.

The previous prime is 616263799. The next prime is 616263811. The reversal of 616263809 is 908362616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616263809 - 2⁴ = 616263793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616263829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44018837 + ... + 44018850.

It is an arithmetic number, because the mean of its divisors is an integer number (176075376).

Almost surely, 2^616263809 is an apocalyptic number.

It is an amenable number.

616263809 is a deficient number, since it is larger than the sum of its proper divisors (88037695).

616263809 is an equidigital number, since it uses as much as digits as its factorization.

616263809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88037694.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 616263809 is about 24824.6613068537. The cubic root of 616263809 is about 850.9856197713.

The spelling of 616263809 in words is "six hundred sixteen million, two hundred sixty-three thousand, eight hundred nine".