40945649977 has 4 divisors (see below), whose sum is σ = 40946092020. Its totient is φ = 40945207936.

The previous prime is 40945649959. The next prime is 40945650001. The reversal of 40945649977 is 77994654904.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5850873081 + 35094776896 = 76491^2 + 187336^2 .

It is a cyclic number.

It is not a de Polignac number, because 40945649977 - 2¹¹ = 40945647929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40945649957) 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, 22852 + ... + 287077.

It is an arithmetic number, because the mean of its divisors is an integer number (10236523005).

Almost surely, 2^40945649977 is an apocalyptic number.

It is an amenable number.

40945649977 is a deficient number, since it is larger than the sum of its proper divisors (442043).

40945649977 is a wasteful number, since it uses less digits than its factorization.

40945649977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442042.

The product of its (nonzero) digits is 68584320, while the sum is 64.

The spelling of 40945649977 in words is "forty billion, nine hundred forty-five million, six hundred forty-nine thousand, nine hundred seventy-seven".