40405179679 has 2 divisors, whose sum is σ = 40405179680. Its totient is φ = 40405179678.

The previous prime is 40405179649. The next prime is 40405179691. The reversal of 40405179679 is 97697150404.

40405179679 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 a de Polignac number, because none of the positive numbers 2^k-40405179679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40405179649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202589839 + 20202589840.

It is an arithmetic number, because the mean of its divisors is an integer number (20202589840).

Almost surely, 2^40405179679 is an apocalyptic number.

40405179679 is a deficient number, since it is larger than the sum of its proper divisors (1).

40405179679 is an equidigital number, since it uses as much as digits as its factorization.

40405179679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 40405179679 in words is "forty billion, four hundred five million, one hundred seventy-nine thousand, six hundred seventy-nine".