40421013555 has 96 divisors (see below), whose sum is σ = 72250859520. Its totient is φ = 19277606400.

The previous prime is 40421013541. The next prime is 40421013559. The reversal of 40421013555 is 55531012404.

40421013555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40421013555 - 2⁷ = 40421013427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40421013559) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12031966 + ... + 12035324.

It is an arithmetic number, because the mean of its divisors is an integer number (752613120).

Almost surely, 2^40421013555 is an apocalyptic number.

40421013555 is a deficient number, since it is larger than the sum of its proper divisors (31829845965).

40421013555 is a wasteful number, since it uses less digits than its factorization.

40421013555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541 (or 3528 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 40421013555 its reverse (55531012404), we get a palindrome (95952025959).

The spelling of 40421013555 in words is "forty billion, four hundred twenty-one million, thirteen thousand, five hundred fifty-five".