3646263491 has 4 divisors (see below), whose sum is σ = 3926745312. Its totient is φ = 3365781672.

The previous prime is 3646263487. The next prime is 3646263497. The reversal of 3646263491 is 1943626463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1943626463 = 347 ⋅5601229.

It is a cyclic number.

It is not a de Polignac number, because 3646263491 - 2² = 3646263487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646263497) 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, 140240891 + ... + 140240916.

It is an arithmetic number, because the mean of its divisors is an integer number (981686328).

Almost surely, 2^3646263491 is an apocalyptic number.

3646263491 is a deficient number, since it is larger than the sum of its proper divisors (280481821).

3646263491 is a wasteful number, since it uses less digits than its factorization.

3646263491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280481820.

The product of its digits is 559872, while the sum is 44.

The square root of 3646263491 is about 60384.2983812845. The cubic root of 3646263491 is about 1539.1561536243.

The spelling of 3646263491 in words is "three billion, six hundred forty-six million, two hundred sixty-three thousand, four hundred ninety-one".