40002566949 has 6 divisors (see below), whose sum is σ = 57781485606. Its totient is φ = 26668377960.

The previous prime is 40002566939. The next prime is 40002566977. The reversal of 40002566949 is 94966520004.

40002566949 is a `hidden beast` number, since 40 + 0 + 0 + 2 + 566 + 9 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23597568225 + 16404998724 = 153615^2 + 128082^2 .

It is not a de Polignac number, because 40002566949 - 2¹⁵ = 40002534181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002566939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2222364822 + ... + 2222364839.

It is an arithmetic number, because the mean of its divisors is an integer number (9630247601).

Almost surely, 2^40002566949 is an apocalyptic number.

It is an amenable number.

40002566949 is a deficient number, since it is larger than the sum of its proper divisors (17778918657).

40002566949 is a wasteful number, since it uses less digits than its factorization.

40002566949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444729667 (or 4444729664 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 40002566949 in words is "forty billion, two million, five hundred sixty-six thousand, nine hundred forty-nine".