40878765821531 has 8 divisors (see below), whose sum is σ = 44760797996400. Its totient is φ = 37024363769440.

The previous prime is 40878765821501. The next prime is 40878765821549. The reversal of 40878765821531 is 13512856787804.

40878765821531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40878765821531 is a prime.

It is a super-2 number, since 2×40878765821531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40878765821501) by changing a digit.

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, 6907527596 + ... + 6907533513.

It is an arithmetic number, because the mean of its divisors is an integer number (5595099749550).

Almost surely, 2^{40878765821531} is an apocalyptic number.

40878765821531 is a deficient number, since it is larger than the sum of its proper divisors (3882032174869).

40878765821531 is a wasteful number, since it uses less digits than its factorization.

40878765821531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13815061389.

The product of its (nonzero) digits is 90316800, while the sum is 65.

The spelling of 40878765821531 in words is "forty trillion, eight hundred seventy-eight billion, seven hundred sixty-five million, eight hundred twenty-one thousand, five hundred thirty-one".