40021143310655 has 8 divisors (see below), whose sum is σ = 51719631355392. Its totient is φ = 29554075060128.

The previous prime is 40021143310651. The next prime is 40021143310669. The reversal of 40021143310655 is 55601334112004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40021143310655 - 2² = 40021143310651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021143310651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307854948479 + ... + 307854948608.

It is an arithmetic number, because the mean of its divisors is an integer number (6464953919424).

Almost surely, 2^{40021143310655} is an apocalyptic number.

40021143310655 is a deficient number, since it is larger than the sum of its proper divisors (11698488044737).

40021143310655 is a wasteful number, since it uses less digits than its factorization.

40021143310655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615709897105.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 40021143310655 its reverse (55601334112004), we get a palindrome (95622477422659).

The spelling of 40021143310655 in words is "forty trillion, twenty-one billion, one hundred forty-three million, three hundred ten thousand, six hundred fifty-five".