2516265809 has 4 divisors (see below), whose sum is σ = 2517991920. Its totient is φ = 2514539700.

The previous prime is 2516265767. The next prime is 2516265811. The reversal of 2516265809 is 9085626152.

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 2516265809 - 2²⁸ = 2247830353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2516265809.

It is not an unprimeable number, because it can be changed into a prime (2516265839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860867 + ... + 863784.

It is an arithmetic number, because the mean of its divisors is an integer number (629497980).

Almost surely, 2^2516265809 is an apocalyptic number.

It is an amenable number.

2516265809 is a deficient number, since it is larger than the sum of its proper divisors (1726111).

2516265809 is a wasteful number, since it uses less digits than its factorization.

2516265809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726110.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 2516265809 is about 50162.3943706837. The cubic root of 2516265809 is about 1360.1459274283.

The spelling of 2516265809 in words is "two billion, five hundred sixteen million, two hundred sixty-five thousand, eight hundred nine".