40678452769 has 2 divisors, whose sum is σ = 40678452770. Its totient is φ = 40678452768.

The previous prime is 40678452677. The next prime is 40678452797. The reversal of 40678452769 is 96725487604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23625227025 + 17053225744 = 153705^2 + 130588^2 .

It is a cyclic number.

It is not a de Polignac number, because 40678452769 - 2³³ = 32088518177 is a prime.

It is a super-2 number, since 2×40678452769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40678459769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20339226384 + 20339226385.

It is an arithmetic number, because the mean of its divisors is an integer number (20339226385).

Almost surely, 2^40678452769 is an apocalyptic number.

It is an amenable number.

40678452769 is a deficient number, since it is larger than the sum of its proper divisors (1).

40678452769 is an equidigital number, since it uses as much as digits as its factorization.

40678452769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 40678452769 in words is "forty billion, six hundred seventy-eight million, four hundred fifty-two thousand, seven hundred sixty-nine".