40847878791 has 6 divisors (see below), whose sum is σ = 59002491600. Its totient is φ = 27231919188.

The previous prime is 40847878781. The next prime is 40847878823. The reversal of 40847878791 is 19787874804.

40847878791 is a `hidden beast` number, since 4 + 0 + 8 + 478 + 78 + 7 + 91 = 666.

It is not a de Polignac number, because 40847878791 - 2⁶ = 40847878727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40847878781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2269326591 + ... + 2269326608.

It is an arithmetic number, because the mean of its divisors is an integer number (9833748600).

Almost surely, 2^40847878791 is an apocalyptic number.

40847878791 is a deficient number, since it is larger than the sum of its proper divisors (18154612809).

40847878791 is a wasteful number, since it uses less digits than its factorization.

40847878791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538653205 (or 4538653202 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 63.

The spelling of 40847878791 in words is "forty billion, eight hundred forty-seven million, eight hundred seventy-eight thousand, seven hundred ninety-one".