40678532569 has 4 divisors (see below), whose sum is σ = 43071387444. Its totient is φ = 38285677696.

The previous prime is 40678532549. The next prime is 40678532579. The reversal of 40678532569 is 96523587604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36632046025 + 4046486544 = 191395^2 + 63612^2 .

It is not a de Polignac number, because 40678532569 - 2¹³ = 40678524377 is a prime.

It is a super-2 number, since 2×40678532569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40678532549) 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 3 ways as a sum of consecutive naturals, for example, 1196427412 + ... + 1196427445.

It is an arithmetic number, because the mean of its divisors is an integer number (10767846861).

Almost surely, 2^40678532569 is an apocalyptic number.

It is an amenable number.

40678532569 is a deficient number, since it is larger than the sum of its proper divisors (2392854875).

40678532569 is a wasteful number, since it uses less digits than its factorization.

40678532569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392854874.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 40678532569 in words is "forty billion, six hundred seventy-eight million, five hundred thirty-two thousand, five hundred sixty-nine".