40002801878 has 8 divisors (see below), whose sum is σ = 64619910768. Its totient is φ = 18462831624.

The previous prime is 40002801877. The next prime is 40002801953. The reversal of 40002801878 is 87810820004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002801877) 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, 769284626 + ... + 769284677.

It is an arithmetic number, because the mean of its divisors is an integer number (8077488846).

Almost surely, 2^40002801878 is an apocalyptic number.

40002801878 is a deficient number, since it is larger than the sum of its proper divisors (24617108890).

40002801878 is a wasteful number, since it uses less digits than its factorization.

40002801878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538569318.

The product of its (nonzero) digits is 28672, while the sum is 38.

The spelling of 40002801878 in words is "forty billion, two million, eight hundred one thousand, eight hundred seventy-eight".