3261263645 has 32 divisors (see below), whose sum is σ = 4200768000. Its totient is φ = 2423165760.

The previous prime is 3261263641. The next prime is 3261263653. The reversal of 3261263645 is 5463621623.

It is a happy number.

It is not a de Polignac number, because 3261263645 - 2² = 3261263641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3261263599 and 3261263608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261263641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3199946 + ... + 3200964.

It is an arithmetic number, because the mean of its divisors is an integer number (131274000).

Almost surely, 2^3261263645 is an apocalyptic number.

It is an amenable number.

3261263645 is a deficient number, since it is larger than the sum of its proper divisors (939504355).

3261263645 is a wasteful number, since it uses less digits than its factorization.

3261263645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673.

The product of its digits is 155520, while the sum is 38.

The square root of 3261263645 is about 57107.4745107854. The cubic root of 3261263645 is about 1482.9572664735.

The spelling of 3261263645 in words is "three billion, two hundred sixty-one million, two hundred sixty-three thousand, six hundred forty-five".