3691261863 has 24 divisors (see below), whose sum is σ = 5409556880. Its totient is φ = 2425023360.

The previous prime is 3691261859. The next prime is 3691261891. The reversal of 3691261863 is 3681621963.

3691261863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3691261863 - 2² = 3691261859 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3691261823) 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, 1221168 + ... + 1224186.

Almost surely, 2^3691261863 is an apocalyptic number.

3691261863 is a deficient number, since it is larger than the sum of its proper divisors (1718295017).

3691261863 is a wasteful number, since it uses less digits than its factorization.

3691261863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959 (or 4956 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 3691261863 is about 60755.7558014054. The cubic root of 3691261863 is about 1545.4618369849.

The spelling of 3691261863 in words is "three billion, six hundred ninety-one million, two hundred sixty-one thousand, eight hundred sixty-three".