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64877283871 is a prime number
BaseRepresentation
bin111100011010111111…
…001100101000011111
320012110102001111102121
4330122333030220133
52030332041040441
645445413203411
74454501546131
oct743277145037
9205412044377
1064877283871
1125572598684
12106a7330567
13616c05078a
1431d652d051
151a4aa18dd1
hexf1afcca1f

64877283871 has 2 divisors, whose sum is σ = 64877283872. Its totient is φ = 64877283870.

The previous prime is 64877283829. The next prime is 64877283883. The reversal of 64877283871 is 17838277846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64877283871 - 217 = 64877152799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64877283371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32438641935 + 32438641936.

It is an arithmetic number, because the mean of its divisors is an integer number (32438641936).

Almost surely, 264877283871 is an apocalyptic number.

64877283871 is a deficient number, since it is larger than the sum of its proper divisors (1).

64877283871 is an equidigital number, since it uses as much as digits as its factorization.

64877283871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25288704, while the sum is 61.

The spelling of 64877283871 in words is "sixty-four billion, eight hundred seventy-seven million, two hundred eighty-three thousand, eight hundred seventy-one".