636457512947 has 2 divisors, whose sum is σ = 636457512948. Its totient is φ = 636457512946.

The previous prime is 636457512883. The next prime is 636457512959. The reversal of 636457512947 is 749215754636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 636457512947 - 2⁶ = 636457512883 is a prime.

It is not a weakly prime, because it can be changed into another prime (636457511947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318228756473 + 318228756474.

It is an arithmetic number, because the mean of its divisors is an integer number (318228756474).

Almost surely, 2^636457512947 is an apocalyptic number.

636457512947 is a deficient number, since it is larger than the sum of its proper divisors (1).

636457512947 is an equidigital number, since it uses as much as digits as its factorization.

636457512947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 59.

The spelling of 636457512947 in words is "six hundred thirty-six billion, four hundred fifty-seven million, five hundred twelve thousand, nine hundred forty-seven".