6541662004042 has 32 divisors (see below), whose sum is σ = 10886033838528. Its totient is φ = 2923121040000.

The previous prime is 6541662004021. The next prime is 6541662004061. The reversal of 6541662004042 is 2404002661456.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6541662003986 and 6541662004004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084542 + ... + 3776182.

It is an arithmetic number, because the mean of its divisors is an integer number (340188557454).

Almost surely, 2^{6541662004042} is an apocalyptic number.

6541662004042 is a deficient number, since it is larger than the sum of its proper divisors (4344371834486).

6541662004042 is a wasteful number, since it uses less digits than its factorization.

6541662004042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693526.

The product of its (nonzero) digits is 276480, while the sum is 40.

Adding to 6541662004042 its reverse (2404002661456), we get a palindrome (8945664665498).

The spelling of 6541662004042 in words is "six trillion, five hundred forty-one billion, six hundred sixty-two million, four thousand, forty-two".