40001024021438 has 16 divisors (see below), whose sum is σ = 60458072220000. Its totient is φ = 19848850018272.

The previous prime is 40001024021429. The next prime is 40001024021447. The reversal of 40001024021438 is 83412042010004.

It is an interprime number because it is at equal distance from previous prime (40001024021429) and next prime (40001024021447).

It is a self number, because there is not a number n which added to its sum of digits gives 40001024021438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129029093 + ... + 129338736.

It is an arithmetic number, because the mean of its divisors is an integer number (3778629513750).

Almost surely, 2^{40001024021438} is an apocalyptic number.

40001024021438 is a deficient number, since it is larger than the sum of its proper divisors (20457048198562).

40001024021438 is a wasteful number, since it uses less digits than its factorization.

40001024021438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258368419.

The product of its (nonzero) digits is 6144, while the sum is 29.

The spelling of 40001024021438 in words is "forty trillion, one billion, twenty-four million, twenty-one thousand, four hundred thirty-eight".