6398765913 has 4 divisors (see below), whose sum is σ = 8531687888. Its totient is φ = 4265843940.

The previous prime is 6398765909. The next prime is 6398765917. The reversal of 6398765913 is 3195678936.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (6398765909) and next prime (6398765917).

It is not a de Polignac number, because 6398765913 - 2² = 6398765909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6398765917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066460983 + ... + 1066460988.

It is an arithmetic number, because the mean of its divisors is an integer number (2132921972).

Almost surely, 2^6398765913 is an apocalyptic number.

It is an amenable number.

6398765913 is a deficient number, since it is larger than the sum of its proper divisors (2132921975).

6398765913 is a wasteful number, since it uses less digits than its factorization.

6398765913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132921974.

The product of its digits is 7348320, while the sum is 57.

The square root of 6398765913 is about 79992.2865843951. The cubic root of 6398765913 is about 1856.5161898481.

The spelling of 6398765913 in words is "six billion, three hundred ninety-eight million, seven hundred sixty-five thousand, nine hundred thirteen".