40520778168 has 64 divisors (see below), whose sum is σ = 109218695040. Its totient is φ = 12453727104.

The previous prime is 40520778167. The next prime is 40520778211. The reversal of 40520778168 is 86187702504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520778167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201955 + ... + 349037.

It is an arithmetic number, because the mean of its divisors is an integer number (1706542110).

Almost surely, 2^40520778168 is an apocalyptic number.

It is an amenable number.

40520778168 is an abundant number, since it is smaller than the sum of its proper divisors (68697916872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40520778168 is a wasteful number, since it uses less digits than its factorization.

40520778168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147988 (or 147984 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 40520778168 in words is "forty billion, five hundred twenty million, seven hundred seventy-eight thousand, one hundred sixty-eight".