40816868849 has 4 divisors (see below), whose sum is σ = 40818776064. Its totient is φ = 40814961636.

The previous prime is 40816868839. The next prime is 40816868857. The reversal of 40816868849 is 94886861804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40816868849 - 2⁸ = 40816868593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40816868791 and 40816868800.

It is not an unprimeable number, because it can be changed into a prime (40816868839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921137 + ... + 964430.

It is an arithmetic number, because the mean of its divisors is an integer number (10204694016).

Almost surely, 2^40816868849 is an apocalyptic number.

It is an amenable number.

40816868849 is a deficient number, since it is larger than the sum of its proper divisors (1907215).

40816868849 is a wasteful number, since it uses less digits than its factorization.

40816868849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907214.

The product of its (nonzero) digits is 21233664, while the sum is 62.

The spelling of 40816868849 in words is "forty billion, eight hundred sixteen million, eight hundred sixty-eight thousand, eight hundred forty-nine".