40878765821564 has 24 divisors (see below), whose sum is σ = 78041561342976. Its totient is φ = 18581190254000.

The previous prime is 40878765821549. The next prime is 40878765821639. The reversal of 40878765821564 is 46512856787804.

40878765821564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11920019 + ... + 14961429.

It is an arithmetic number, because the mean of its divisors is an integer number (3251731722624).

Almost surely, 2^{40878765821564} is an apocalyptic number.

40878765821564 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40878765821564 is a deficient number, since it is larger than the sum of its proper divisors (37162795521412).

40878765821564 is a wasteful number, since it uses less digits than its factorization.

40878765821564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346897 (or 3346895 counting only the distinct ones).

The product of its (nonzero) digits is 722534400, while the sum is 71.

The spelling of 40878765821564 in words is "forty trillion, eight hundred seventy-eight billion, seven hundred sixty-five million, eight hundred twenty-one thousand, five hundred sixty-four".