2861265961 has 8 divisors (see below), whose sum is σ = 2883566304. Its totient is φ = 2838986400.

The previous prime is 2861265949. The next prime is 2861265983. The reversal of 2861265961 is 1695621682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2861265961 - 2⁵ = 2861265929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2861265061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380286 + ... + 387736.

It is an arithmetic number, because the mean of its divisors is an integer number (360445788).

Almost surely, 2^2861265961 is an apocalyptic number.

It is an amenable number.

2861265961 is a deficient number, since it is larger than the sum of its proper divisors (22300343).

2861265961 is a wasteful number, since it uses less digits than its factorization.

2861265961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10391.

The product of its digits is 311040, while the sum is 46.

The square root of 2861265961 is about 53490.8025832479. The cubic root of 2861265961 is about 1419.6656557609.

The spelling of 2861265961 in words is "two billion, eight hundred sixty-one million, two hundred sixty-five thousand, nine hundred sixty-one".