2616406805 has 4 divisors (see below), whose sum is σ = 3139688172. Its totient is φ = 2093125440.

The previous prime is 2616406787. The next prime is 2616406823. The reversal of 2616406805 is 5086046162.

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

It is an interprime number because it is at equal distance from previous prime (2616406787) and next prime (2616406823).

It can be written as a sum of positive squares in 2 ways, for example, as 1147447876 + 1468958929 = 33874^2 + 38327^2 .

It is not a de Polignac number, because 2616406805 - 2⁸ = 2616406549 is a prime.

It is a Duffinian number.

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, 261640676 + ... + 261640685.

It is an arithmetic number, because the mean of its divisors is an integer number (784922043).

Almost surely, 2^2616406805 is an apocalyptic number.

It is an amenable number.

2616406805 is a deficient number, since it is larger than the sum of its proper divisors (523281367).

2616406805 is an equidigital number, since it uses as much as digits as its factorization.

2616406805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523281366.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 2616406805 is about 51150.8240891581. The cubic root of 2616406805 is about 1377.9551744943.

The spelling of 2616406805 in words is "two billion, six hundred sixteen million, four hundred six thousand, eight hundred five".