8440022778831 has 32 divisors (see below), whose sum is σ = 14295253752320. Its totient is φ = 4821092177472.

The previous prime is 8440022778823. The next prime is 8440022778833. The reversal of 8440022778831 is 1388772200448.

8440022778831 is a `hidden beast` number, since 8 + 4 + 400 + 227 + 7 + 8 + 8 + 3 + 1 = 666.

It is not a de Polignac number, because 8440022778831 - 2³ = 8440022778823 is a prime.

It is a super-2 number, since 2×8440022778831² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440022778833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7717285 + ... + 8742798.

It is an arithmetic number, because the mean of its divisors is an integer number (446726679760).

Almost surely, 2^{8440022778831} is an apocalyptic number.

8440022778831 is a deficient number, since it is larger than the sum of its proper divisors (5855230973489).

8440022778831 is a wasteful number, since it uses less digits than its factorization.

8440022778831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16462812 (or 16462806 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 54.

The spelling of 8440022778831 in words is "eight trillion, four hundred forty billion, twenty-two million, seven hundred seventy-eight thousand, eight hundred thirty-one".