40444221142 has 24 divisors (see below), whose sum is σ = 69149426760. Its totient is φ = 17684110080.

The previous prime is 40444221137. The next prime is 40444221157. The reversal of 40444221142 is 24112244404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40444221142.

It is a congruent number.

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, 3142459 + ... + 3155302.

It is an arithmetic number, because the mean of its divisors is an integer number (2881226115).

Almost surely, 2^40444221142 is an apocalyptic number.

40444221142 is a deficient number, since it is larger than the sum of its proper divisors (28705205618).

40444221142 is a wasteful number, since it uses less digits than its factorization.

40444221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297808 (or 6297795 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 40444221142 its reverse (24112244404), we get a palindrome (64556465546).

The spelling of 40444221142 in words is "forty billion, four hundred forty-four million, two hundred twenty-one thousand, one hundred forty-two".