423440205536401 has 4 divisors (see below), whose sum is σ = 445726532143600. Its totient is φ = 401153878929204.

The previous prime is 423440205536323. The next prime is 423440205536407. The reversal of 423440205536401 is 104635502044324.

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 423440205536401 - 2⁷ = 423440205536273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423440205536407) 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, 11143163303571 + ... + 11143163303608.

It is an arithmetic number, because the mean of its divisors is an integer number (111431633035900).

Almost surely, 2^{423440205536401} is an apocalyptic number.

It is an amenable number.

423440205536401 is a deficient number, since it is larger than the sum of its proper divisors (22286326607199).

423440205536401 is a wasteful number, since it uses less digits than its factorization.

423440205536401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22286326607198.

The product of its (nonzero) digits is 1382400, while the sum is 43.

The spelling of 423440205536401 in words is "four hundred twenty-three trillion, four hundred forty billion, two hundred five million, five hundred thirty-six thousand, four hundred one".