40026406403 has 4 divisors (see below), whose sum is σ = 40257773088. Its totient is φ = 39795039720.

The previous prime is 40026406393. The next prime is 40026406421. The reversal of 40026406403 is 30460462004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40026406403 is a prime.

It is a super-2 number, since 2×40026406403² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40026406603) 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, 115683083 + ... + 115683428.

It is an arithmetic number, because the mean of its divisors is an integer number (10064443272).

Almost surely, 2^40026406403 is an apocalyptic number.

40026406403 is a deficient number, since it is larger than the sum of its proper divisors (231366685).

40026406403 is a wasteful number, since it uses less digits than its factorization.

40026406403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231366684.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 40026406403 its reverse (30460462004), we get a palindrome (70486868407).

The spelling of 40026406403 in words is "forty billion, twenty-six million, four hundred six thousand, four hundred three".