40444140022421 has 16 divisors (see below), whose sum is σ = 40953161586480. Its totient is φ = 39937725112320.

The previous prime is 40444140022417. The next prime is 40444140022423. The reversal of 40444140022421 is 12422004144404.

It can be written as a sum of positive squares in 8 ways, for example, as 8263037702500 + 32181102319921 = 2874550^2 + 5672839^2 .

It is a cyclic number.

It is not a de Polignac number, because 40444140022421 - 2² = 40444140022417 is a prime.

It is a super-2 number, since 2×40444140022421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40444140022423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89439725 + ... + 89890781.

It is an arithmetic number, because the mean of its divisors is an integer number (2559572599155).

Almost surely, 2^{40444140022421} is an apocalyptic number.

It is an amenable number.

40444140022421 is a deficient number, since it is larger than the sum of its proper divisors (509021564059).

40444140022421 is a wasteful number, since it uses less digits than its factorization.

40444140022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453944.

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 40444140022421 its reverse (12422004144404), we get a palindrome (52866144166825).

The spelling of 40444140022421 in words is "forty trillion, four hundred forty-four billion, one hundred forty million, twenty-two thousand, four hundred twenty-one".