40235021645242 has 8 divisors (see below), whose sum is σ = 60366409816500. Its totient is φ = 20112885039744.

The previous prime is 40235021645179. The next prime is 40235021645263. The reversal of 40235021645242 is 24254612053204.

It can be written as a sum of positive squares in 2 ways, for example, as 40081826902441 + 153194742801 = 6331021^2 + 391401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 40235021645195 and 40235021645204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312880567 + ... + 2312897962.

Almost surely, 2^{40235021645242} is an apocalyptic number.

40235021645242 is a deficient number, since it is larger than the sum of its proper divisors (20131388171258).

40235021645242 is a wasteful number, since it uses less digits than its factorization.

40235021645242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4625782880.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 40235021645242 its reverse (24254612053204), we get a palindrome (64489633698446).

The spelling of 40235021645242 in words is "forty trillion, two hundred thirty-five billion, twenty-one million, six hundred forty-five thousand, two hundred forty-two".