40820818778 has 8 divisors (see below), whose sum is σ = 64833065172. Its totient is φ = 19209797056.

The previous prime is 40820818711. The next prime is 40820818799. The reversal of 40820818778 is 87781802804.

It can be written as a sum of positive squares in 2 ways, for example, as 40817333089 + 3485689 = 202033^2 + 1867^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600306125 + ... + 600306192.

Almost surely, 2^40820818778 is an apocalyptic number.

40820818778 is a deficient number, since it is larger than the sum of its proper divisors (24012246394).

40820818778 is a wasteful number, since it uses less digits than its factorization.

40820818778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200612336.

The product of its (nonzero) digits is 1605632, while the sum is 53.

The spelling of 40820818778 in words is "forty billion, eight hundred twenty million, eight hundred eighteen thousand, seven hundred seventy-eight".