2581276965 has 16 divisors (see below), whose sum is σ = 4155384768. Its totient is φ = 1368233856.

The previous prime is 2581276933. The next prime is 2581276981. The reversal of 2581276965 is 5696721852.

2581276965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2581276965 - 2⁵ = 2581276933 is a prime.

It is a super-2 number, since 2×2581276965² = 13325981540079222450, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525424 + ... + 530313.

It is an arithmetic number, because the mean of its divisors is an integer number (259711548).

Almost surely, 2^2581276965 is an apocalyptic number.

It is an amenable number.

2581276965 is a deficient number, since it is larger than the sum of its proper divisors (1574107803).

2581276965 is a wasteful number, since it uses less digits than its factorization.

2581276965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055908.

The product of its digits is 1814400, while the sum is 51.

The square root of 2581276965 is about 50806.2689537423. The cubic root of 2581276965 is about 1371.7602119353.

The spelling of 2581276965 in words is "two billion, five hundred eighty-one million, two hundred seventy-six thousand, nine hundred sixty-five".