6401044415642 has 16 divisors (see below), whose sum is σ = 9691433619840. Its totient is φ = 3170567361888.

The previous prime is 6401044415639. The next prime is 6401044415669. The reversal of 6401044415642 is 2465144401046.

It is a super-2 number, since 2×6401044415642² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6401044415642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20191334 + ... + 20505902.

It is an arithmetic number, because the mean of its divisors is an integer number (605714601240).

Almost surely, 2^{6401044415642} is an apocalyptic number.

6401044415642 is a deficient number, since it is larger than the sum of its proper divisors (3290389204198).

6401044415642 is a wasteful number, since it uses less digits than its factorization.

6401044415642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409765.

The product of its (nonzero) digits is 368640, while the sum is 41.

Adding to 6401044415642 its reverse (2465144401046), we get a palindrome (8866188816688).

The spelling of 6401044415642 in words is "six trillion, four hundred one billion, forty-four million, four hundred fifteen thousand, six hundred forty-two".