32643863653 has 4 divisors (see below), whose sum is σ = 34361961760. Its totient is φ = 30925765548.

The previous prime is 32643863647. The next prime is 32643863663. The reversal of 32643863653 is 35636834623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35636834623 = 13 ⋅2741294971.

It is a cyclic number.

It is not a de Polignac number, because 32643863653 - 2⁵ = 32643863621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32643863597 and 32643863606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32643863663) 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, 859049025 + ... + 859049062.

It is an arithmetic number, because the mean of its divisors is an integer number (8590490440).

Almost surely, 2^32643863653 is an apocalyptic number.

It is an amenable number.

32643863653 is a deficient number, since it is larger than the sum of its proper divisors (1718098107).

32643863653 is a wasteful number, since it uses less digits than its factorization.

32643863653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718098106.

The product of its digits is 5598720, while the sum is 49.

The spelling of 32643863653 in words is "thirty-two billion, six hundred forty-three million, eight hundred sixty-three thousand, six hundred fifty-three".