40021143310640 has 20 divisors (see below), whose sum is σ = 93049158197424. Its totient is φ = 16008457324224.

The previous prime is 40021143310597. The next prime is 40021143310651. The reversal of 40021143310640 is 4601334112004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

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, 250132145612 + ... + 250132145771.

Almost surely, 2^{40021143310640} is an apocalyptic number.

40021143310640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40021143310640 is an abundant number, since it is smaller than the sum of its proper divisors (53028014886784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40021143310640 is a wasteful number, since it uses less digits than its factorization.

40021143310640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500264291396 (or 500264291390 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 40021143310640 its reverse (4601334112004), we get a palindrome (44622477422644).

The spelling of 40021143310640 in words is "forty trillion, twenty-one billion, one hundred forty-three million, three hundred ten thousand, six hundred forty".