40816549 has 4 divisors (see below), whose sum is σ = 40843264. Its totient is φ = 40789836.

The previous prime is 40816499. The next prime is 40816561. The reversal of 40816549 is 94561804.

It is a happy number.

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 40816549 - 2¹⁵ = 40783781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40816049) 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, 10917 + ... + 14170.

It is an arithmetic number, because the mean of its divisors is an integer number (10210816).

Almost surely, 2^40816549 is an apocalyptic number.

It is an amenable number.

40816549 is a deficient number, since it is larger than the sum of its proper divisors (26715).

40816549 is a wasteful number, since it uses less digits than its factorization.

40816549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26714.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 40816549 is about 6388.7830609593. The cubic root of 40816549 is about 344.3066632849.

The spelling of 40816549 in words is "forty million, eight hundred sixteen thousand, five hundred forty-nine".