40618777780 has 24 divisors (see below), whose sum is σ = 97485067008. Its totient is φ = 13926438048.

The previous prime is 40618777763. The next prime is 40618777781. The reversal of 40618777780 is 8777781604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40618777781) 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 7 ways as a sum of consecutive naturals, for example, 145066924 + ... + 145067203.

It is an arithmetic number, because the mean of its divisors is an integer number (4061877792).

Almost surely, 2^40618777780 is an apocalyptic number.

It is an amenable number.

40618777780 is an abundant number, since it is smaller than the sum of its proper divisors (56866289228).

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

40618777780 is a wasteful number, since it uses less digits than its factorization.

40618777780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290134143 (or 290134141 counting only the distinct ones).

The product of its (nonzero) digits is 3687936, while the sum is 55.

The spelling of 40618777780 in words is "forty billion, six hundred eighteen million, seven hundred seventy-seven thousand, seven hundred eighty".