40689223279 has 2 divisors, whose sum is σ = 40689223280. Its totient is φ = 40689223278.

The previous prime is 40689223247. The next prime is 40689223307. The reversal of 40689223279 is 97232298604.

40689223279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40689223279 - 2⁵ = 40689223247 is a prime.

It is a super-2 number, since 2×40689223279² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40689223219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344611639 + 20344611640.

It is an arithmetic number, because the mean of its divisors is an integer number (20344611640).

Almost surely, 2^40689223279 is an apocalyptic number.

40689223279 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689223279 is an equidigital number, since it uses as much as digits as its factorization.

40689223279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 40689223279 in words is "forty billion, six hundred eighty-nine million, two hundred twenty-three thousand, two hundred seventy-nine".