40404254237 has 4 divisors (see below), whose sum is σ = 40404743676. Its totient is φ = 40403764800.

The previous prime is 40404254197. The next prime is 40404254251. The reversal of 40404254237 is 73245240404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13851877636 + 26552376601 = 117694^2 + 162949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40404254237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40404254197 and 40404254206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404257237) 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, 87014 + ... + 297287.

It is an arithmetic number, because the mean of its divisors is an integer number (10101185919).

Almost surely, 2^40404254237 is an apocalyptic number.

It is an amenable number.

40404254237 is a deficient number, since it is larger than the sum of its proper divisors (489439).

40404254237 is a wasteful number, since it uses less digits than its factorization.

40404254237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489438.

The product of its (nonzero) digits is 107520, while the sum is 35.

The spelling of 40404254237 in words is "forty billion, four hundred four million, two hundred fifty-four thousand, two hundred thirty-seven".