40421293784 has 16 divisors (see below), whose sum is σ = 77552482920. Its totient is φ = 19740631680.

The previous prime is 40421293777. The next prime is 40421293789. The reversal of 40421293784 is 48739212404.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421293789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58751537 + ... + 58752224.

Almost surely, 2^40421293784 is an apocalyptic number.

It is an amenable number.

40421293784 is a deficient number, since it is larger than the sum of its proper divisors (37131189136).

40421293784 is a wasteful number, since it uses less digits than its factorization.

40421293784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117503810 (or 117503806 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 40421293784 in words is "forty billion, four hundred twenty-one million, two hundred ninety-three thousand, seven hundred eighty-four".