40402410444021 has 4 divisors (see below), whose sum is σ = 53869880592032. Its totient is φ = 26934940296012.

The previous prime is 40402410444017. The next prime is 40402410444091. The reversal of 40402410444021 is 12044401420404.

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 not a de Polignac number, because 40402410444021 - 2² = 40402410444017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40402410444021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402410444091) 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, 6733735074001 + ... + 6733735074006.

It is an arithmetic number, because the mean of its divisors is an integer number (13467470148008).

Almost surely, 2^{40402410444021} is an apocalyptic number.

It is an amenable number.

40402410444021 is a deficient number, since it is larger than the sum of its proper divisors (13467470148011).

40402410444021 is a wasteful number, since it uses less digits than its factorization.

40402410444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13467470148010.

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 40402410444021 its reverse (12044401420404), we get a palindrome (52446811864425).

The spelling of 40402410444021 in words is "forty trillion, four hundred two billion, four hundred ten million, four hundred forty-four thousand, twenty-one".