40636431079 has 2 divisors, whose sum is σ = 40636431080. Its totient is φ = 40636431078.

The previous prime is 40636430963. The next prime is 40636431097. The reversal of 40636431079 is 97013463604.

Together with next prime (40636431097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40636431079 - 2¹⁷ = 40636300007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40636431379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20318215539 + 20318215540.

It is an arithmetic number, because the mean of its divisors is an integer number (20318215540).

Almost surely, 2^40636431079 is an apocalyptic number.

40636431079 is a deficient number, since it is larger than the sum of its proper divisors (1).

40636431079 is an equidigital number, since it uses as much as digits as its factorization.

40636431079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 40636431079 in words is "forty billion, six hundred thirty-six million, four hundred thirty-one thousand, seventy-nine".