40777781856 has 48 divisors (see below), whose sum is σ = 122333347584. Its totient is φ = 11650794624.

The previous prime is 40777781831. The next prime is 40777781873. The reversal of 40777781856 is 65818777704.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 40777781856.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30339940 + ... + 30341283.

It is an arithmetic number, because the mean of its divisors is an integer number (2548611408).

Almost surely, 2^40777781856 is an apocalyptic number.

It is an amenable number.

40777781856 is an abundant number, since it is smaller than the sum of its proper divisors (81555565728).

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

40777781856 is a wasteful number, since it uses less digits than its factorization.

40777781856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60681243 (or 60681235 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 60.

The spelling of 40777781856 in words is "forty billion, seven hundred seventy-seven million, seven hundred eighty-one thousand, eight hundred fifty-six".