40646918479 has 2 divisors, whose sum is σ = 40646918480. Its totient is φ = 40646918478.

The previous prime is 40646918467. The next prime is 40646918561. The reversal of 40646918479 is 97481964604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40646918479 - 2²⁵ = 40613364047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40646912479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20323459239 + 20323459240.

It is an arithmetic number, because the mean of its divisors is an integer number (20323459240).

Almost surely, 2^40646918479 is an apocalyptic number.

40646918479 is a deficient number, since it is larger than the sum of its proper divisors (1).

40646918479 is an equidigital number, since it uses as much as digits as its factorization.

40646918479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 40646918479 in words is "forty billion, six hundred forty-six million, nine hundred eighteen thousand, four hundred seventy-nine".