2679563881 has 4 divisors (see below), whose sum is σ = 2680939264. Its totient is φ = 2678188500.

The previous prime is 2679563879. The next prime is 2679563899. The reversal of 2679563881 is 1883659762.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1883659762 = 2 ⋅941829881.

It is a cyclic number.

It is not a de Polignac number, because 2679563881 - 2¹ = 2679563879 is a prime.

It is a super-2 number, since 2×2679563881² = 14360125184719564322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2679563981) 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, 684765 + ... + 688666.

It is an arithmetic number, because the mean of its divisors is an integer number (670234816).

Almost surely, 2^2679563881 is an apocalyptic number.

It is an amenable number.

2679563881 is a deficient number, since it is larger than the sum of its proper divisors (1375383).

2679563881 is a wasteful number, since it uses less digits than its factorization.

2679563881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375382.

The product of its digits is 4354560, while the sum is 55.

The square root of 2679563881 is about 51764.5040640785. The cubic root of 2679563881 is about 1388.9545614574.

The spelling of 2679563881 in words is "two billion, six hundred seventy-nine million, five hundred sixty-three thousand, eight hundred eighty-one".