432540637621 has 4 divisors (see below), whose sum is σ = 432585595872. Its totient is φ = 432495679372.

The previous prime is 432540637579. The next prime is 432540637631. The reversal of 432540637621 is 126736045234.

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.

It is a cyclic number.

It is not a de Polignac number, because 432540637621 - 2¹¹ = 432540635573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432540637631) 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, 22464691 + ... + 22483936.

It is an arithmetic number, because the mean of its divisors is an integer number (108146398968).

Almost surely, 2^432540637621 is an apocalyptic number.

It is an amenable number.

432540637621 is a deficient number, since it is larger than the sum of its proper divisors (44958251).

432540637621 is an equidigital number, since it uses as much as digits as its factorization.

432540637621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44958250.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 432540637621 in words is "four hundred thirty-two billion, five hundred forty million, six hundred thirty-seven thousand, six hundred twenty-one".