40001024021439 has 48 divisors (see below), whose sum is σ = 58081304793600. Its totient is φ = 24476090715648.

The previous prime is 40001024021429. The next prime is 40001024021447. The reversal of 40001024021439 is 93412042010004.

It is not a de Polignac number, because 40001024021439 - 2¹¹ = 40001024019391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001024021429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1485522394 + ... + 1485549320.

It is an arithmetic number, because the mean of its divisors is an integer number (1210027183200).

Almost surely, 2^{40001024021439} is an apocalyptic number.

40001024021439 is a deficient number, since it is larger than the sum of its proper divisors (18080280772161).

40001024021439 is a wasteful number, since it uses less digits than its factorization.

40001024021439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43504 (or 43491 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 40001024021439 in words is "forty trillion, one billion, twenty-four million, twenty-one thousand, four hundred thirty-nine".