4040400020042 has 8 divisors (see below), whose sum is σ = 6101275198500. Its totient is φ = 2006641620544.

The previous prime is 4040400020039. The next prime is 4040400020051. The reversal of 4040400020042 is 2400200040404.

It can be written as a sum of positive squares in 2 ways, for example, as 4014336823561 + 26063196481 = 2003581^2 + 161441^2 .

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 = 4040400019996 and 4040400020023.

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, 6779194367 + ... + 6779194962.

Almost surely, 2^{4040400020042} is an apocalyptic number.

4040400020042 is a deficient number, since it is larger than the sum of its proper divisors (2060875178458).

4040400020042 is a wasteful number, since it uses less digits than its factorization.

4040400020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558389480.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 4040400020042 its reverse (2400200040404), we get a palindrome (6440600060446).

The spelling of 4040400020042 in words is "four trillion, forty billion, four hundred million, twenty thousand, forty-two".