32405312643 has 8 divisors (see below), whose sum is σ = 47135000256. Its totient is φ = 19639583400.

The previous prime is 32405312593. The next prime is 32405312663. The reversal of 32405312643 is 34621350423.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 32405312643 - 2⁹ = 32405312131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 981979171 = 32405312643 / (3 + 2 + 4 + 0 + 5 + 3 + 1 + 2 + 6 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (32405312663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490989553 + ... + 490989618.

It is an arithmetic number, because the mean of its divisors is an integer number (5891875032).

Almost surely, 2^32405312643 is an apocalyptic number.

32405312643 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

32405312643 is a deficient number, since it is larger than the sum of its proper divisors (14729687613).

32405312643 is a wasteful number, since it uses less digits than its factorization.

32405312643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981979185.

The product of its (nonzero) digits is 51840, while the sum is 33.

The spelling of 32405312643 in words is "thirty-two billion, four hundred five million, three hundred twelve thousand, six hundred forty-three".