3261007881 has 24 divisors (see below), whose sum is σ = 4996769544. Its totient is φ = 2042288640.

The previous prime is 3261007879. The next prime is 3261007927. The reversal of 3261007881 is 1887001623.

3261007881 is a `hidden beast` number, since 32 + 610 + 0 + 7 + 8 + 8 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1057550400 + 2203457481 = 32520^2 + 46941^2 .

It is not a de Polignac number, because 3261007881 - 2¹ = 3261007879 is a prime.

It is a super-2 number, since 2×3261007881² = 21268344799888220322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3261007811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63075 + ... + 102471.

It is an arithmetic number, because the mean of its divisors is an integer number (208198731).

Almost surely, 2^3261007881 is an apocalyptic number.

It is an amenable number.

3261007881 is a deficient number, since it is larger than the sum of its proper divisors (1735761663).

3261007881 is a wasteful number, since it uses less digits than its factorization.

3261007881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39961 (or 39958 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 3261007881 is about 57105.2351452999. The cubic root of 3261007881 is about 1482.9184985766.

The spelling of 3261007881 in words is "three billion, two hundred sixty-one million, seven thousand, eight hundred eighty-one".