40042021115434 has 24 divisors (see below), whose sum is σ = 65039161365612. Its totient is φ = 18480792470400.

The previous prime is 40042021115323. The next prime is 40042021115449. The reversal of 40042021115434 is 43451112024004.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4114548549225 + 35927472566209 = 2028435^2 + 5993953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40042021115396 and 40042021115405.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53778192 + ... + 54517684.

Almost surely, 2^{40042021115434} is an apocalyptic number.

40042021115434 is a deficient number, since it is larger than the sum of its proper divisors (24997140250178).

40042021115434 is a wasteful number, since it uses less digits than its factorization.

40042021115434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899722 (or 899709 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 40042021115434 its reverse (43451112024004), we get a palindrome (83493133139438).

The spelling of 40042021115434 in words is "forty trillion, forty-two billion, twenty-one million, one hundred fifteen thousand, four hundred thirty-four".