2505831965 has 16 divisors (see below), whose sum is σ = 3700921728. Its totient is φ = 1586108736.

The previous prime is 2505831953. The next prime is 2505832027. The reversal of 2505831965 is 5691385052.

It is a cyclic number.

It is not a de Polignac number, because 2505831965 - 2⁸ = 2505831709 is a prime.

It is a super-2 number, since 2×2505831965² = 12558387673631522450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2753207 + ... + 2754116.

It is an arithmetic number, because the mean of its divisors is an integer number (231307608).

Almost surely, 2^2505831965 is an apocalyptic number.

It is an amenable number.

2505831965 is a deficient number, since it is larger than the sum of its proper divisors (1195089763).

2505831965 is a wasteful number, since it uses less digits than its factorization.

2505831965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507348.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 2505831965 is about 50058.2856777976. The cubic root of 2505831965 is about 1358.2633479526.

The spelling of 2505831965 in words is "two billion, five hundred five million, eight hundred thirty-one thousand, nine hundred sixty-five".