40501278818 has 64 divisors (see below), whose sum is σ = 85115584512. Its totient is φ = 13932578880.

The previous prime is 40501278793. The next prime is 40501278863. The reversal of 40501278818 is 81887210504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393746 + ... + 485837.

It is an arithmetic number, because the mean of its divisors is an integer number (1329931008).

Almost surely, 2^40501278818 is an apocalyptic number.

40501278818 is an abundant number, since it is smaller than the sum of its proper divisors (44614305694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40501278818 is a wasteful number, since it uses less digits than its factorization.

40501278818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879639.

The product of its (nonzero) digits is 143360, while the sum is 44.

The spelling of 40501278818 in words is "forty billion, five hundred one million, two hundred seventy-eight thousand, eight hundred eighteen".