40778934309 has 6 divisors (see below), whose sum is σ = 58902905126. Its totient is φ = 27185956200.

The previous prime is 40778934299. The next prime is 40778934323. The reversal of 40778934309 is 90343987704.

40778934309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 24214472100 + 16564462209 = 155610^2 + 128703^2 .

It is not a de Polignac number, because 40778934309 - 2²⁵ = 40745379877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40778934349) 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, 2265496342 + ... + 2265496359.

Almost surely, 2^40778934309 is an apocalyptic number.

It is an amenable number.

40778934309 is a deficient number, since it is larger than the sum of its proper divisors (18123970817).

40778934309 is a wasteful number, since it uses less digits than its factorization.

40778934309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530992707 (or 4530992704 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 40778934309 in words is "forty billion, seven hundred seventy-eight million, nine hundred thirty-four thousand, three hundred nine".