69864443977 has 2 divisors, whose sum is σ = 69864443978. Its totient is φ = 69864443976.

The previous prime is 69864443959. The next prime is 69864444007. The reversal of 69864443977 is 77934446896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48338859321 + 21525584656 = 219861^2 + 146716^2 .

It is a cyclic number.

It is not a de Polignac number, because 69864443977 - 2²⁷ = 69730226249 is a prime.

It is not a weakly prime, because it can be changed into another prime (69864443917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34932221988 + 34932221989.

It is an arithmetic number, because the mean of its divisors is an integer number (34932221989).

Almost surely, 2^69864443977 is an apocalyptic number.

It is an amenable number.

69864443977 is a deficient number, since it is larger than the sum of its proper divisors (1).

69864443977 is an equidigital number, since it uses as much as digits as its factorization.

69864443977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 219469824, while the sum is 67.

The spelling of 69864443977 in words is "sixty-nine billion, eight hundred sixty-four million, four hundred forty-three thousand, nine hundred seventy-seven".