40555440004221 has 12 divisors (see below), whose sum is σ = 59285864103648. Its totient is φ = 26711213496264.

The previous prime is 40555440004217. The next prime is 40555440004223. The reversal of 40555440004221 is 12240004455504.

40555440004221 is a `hidden beast` number, since 4 + 0 + 5 + 554 + 40 + 0 + 0 + 42 + 21 = 666.

It is not a de Polignac number, because 40555440004221 - 2² = 40555440004217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40555440004223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27145541425 + ... + 27145542918.

It is an arithmetic number, because the mean of its divisors is an integer number (4940488675304).

Almost surely, 2^{40555440004221} is an apocalyptic number.

It is an amenable number.

40555440004221 is a deficient number, since it is larger than the sum of its proper divisors (18730424099427).

40555440004221 is a wasteful number, since it uses less digits than its factorization.

40555440004221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54291084432 (or 54291084429 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 40555440004221 its reverse (12240004455504), we get a palindrome (52795444459725).

The spelling of 40555440004221 in words is "forty trillion, five hundred fifty-five billion, four hundred forty million, four thousand, two hundred twenty-one".