423440105021405 has 16 divisors (see below), whose sum is σ = 509230790699904. Its totient is φ = 338017218866880.

The previous prime is 423440105021371. The next prime is 423440105021413. The reversal of 423440105021405 is 504120501044324.

It is a happy number.

It is not a de Polignac number, because 423440105021405 - 2³⁰ = 423439031279581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1436426 + ... + 29136635.

It is an arithmetic number, because the mean of its divisors is an integer number (31826924418744).

Almost surely, 2^{423440105021405} is an apocalyptic number.

It is an amenable number.

423440105021405 is a deficient number, since it is larger than the sum of its proper divisors (85790685678499).

423440105021405 is a wasteful number, since it uses less digits than its factorization.

423440105021405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30579076.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 423440105021405 its reverse (504120501044324), we get a palindrome (927560606065729).

The spelling of 423440105021405 in words is "four hundred twenty-three trillion, four hundred forty billion, one hundred five million, twenty-one thousand, four hundred five".