3261564880 has 80 divisors (see below), whose sum is σ = 8830041984. Its totient is φ = 1097141760.

The previous prime is 3261564877. The next prime is 3261564923. The reversal of 3261564880 is 884651623.

It is a tau number, because it is divible by the number of its divisors (80).

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, 25266 + ... + 84625.

Almost surely, 2^3261564880 is an apocalyptic number.

It is an amenable number.

3261564880 is an abundant number, since it is smaller than the sum of its proper divisors (5568477104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3261564880 is a wasteful number, since it uses less digits than its factorization.

3261564880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109964 (or 109958 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 3261564880 is about 57110.1118892268. Note that the first 3 decimals coincide. The cubic root of 3261564880 is about 1483.0029241211.

The spelling of 3261564880 in words is "three billion, two hundred sixty-one million, five hundred sixty-four thousand, eight hundred eighty".