32391540643 has 24 divisors (see below), whose sum is σ = 41357318240. Its totient is φ = 24826348800.

The previous prime is 32391540637. The next prime is 32391540659. The reversal of 32391540643 is 34604519323.

It is not a de Polignac number, because 32391540643 - 2¹⁷ = 32391409571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32391540596 and 32391540605.

It is not an unprimeable number, because it can be changed into a prime (32391540683) 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, 261798 + ... + 365131.

Almost surely, 2^32391540643 is an apocalyptic number.

32391540643 is a deficient number, since it is larger than the sum of its proper divisors (8965777597).

32391540643 is a wasteful number, since it uses less digits than its factorization.

32391540643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627019 (or 627008 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 32391540643 in words is "thirty-two billion, three hundred ninety-one million, five hundred forty thousand, six hundred forty-three".