40785218390 has 16 divisors (see below), whose sum is σ = 83901020832. Its totient is φ = 13983503424.

The previous prime is 40785218371. The next prime is 40785218399. The reversal of 40785218390 is 9381258704.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40785218399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291322919 + ... + 291323058.

It is an arithmetic number, because the mean of its divisors is an integer number (5243813802).

Almost surely, 2^40785218390 is an apocalyptic number.

40785218390 is an abundant number, since it is smaller than the sum of its proper divisors (43115802442).

40785218390 is a wasteful number, since it uses less digits than its factorization.

40785218390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582645991.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 40785218390 in words is "forty billion, seven hundred eighty-five million, two hundred eighteen thousand, three hundred ninety".