32387768643 has 4 divisors (see below), whose sum is σ = 43183691528. Its totient is φ = 21591845760.

The previous prime is 32387768639. The next prime is 32387768653. The reversal of 32387768643 is 34686778323.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 32387768643 - 2² = 32387768639 is a prime.

It is a super-2 number, since 2×32387768643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32387768653) 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, 5397961438 + ... + 5397961443.

It is an arithmetic number, because the mean of its divisors is an integer number (10795922882).

Almost surely, 2^32387768643 is an apocalyptic number.

32387768643 is a deficient number, since it is larger than the sum of its proper divisors (10795922885).

32387768643 is a wasteful number, since it uses less digits than its factorization.

32387768643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10795922884.

The product of its digits is 24385536, while the sum is 57.

The spelling of 32387768643 in words is "thirty-two billion, three hundred eighty-seven million, seven hundred sixty-eight thousand, six hundred forty-three".