6398872067 has 16 divisors (see below), whose sum is σ = 7634442240. Its totient is φ = 5243881632.

The previous prime is 6398872043. The next prime is 6398872169. The reversal of 6398872067 is 7602788936.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6398872067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6398872027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401609 + ... + 417237.

It is an arithmetic number, because the mean of its divisors is an integer number (477152640).

Almost surely, 2^6398872067 is an apocalyptic number.

6398872067 is a deficient number, since it is larger than the sum of its proper divisors (1235570173).

6398872067 is a wasteful number, since it uses less digits than its factorization.

6398872067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The square root of 6398872067 is about 79992.9501081189. The cubic root of 6398872067 is about 1856.5264561782.

The spelling of 6398872067 in words is "six billion, three hundred ninety-eight million, eight hundred seventy-two thousand, sixty-seven".