6515998022 has 4 divisors (see below), whose sum is σ = 9773997036. Its totient is φ = 3257999010.

The previous prime is 6515998001. The next prime is 6515998057. The reversal of 6515998022 is 2208995156.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628999504 + ... + 1628999507.

It is an arithmetic number, because the mean of its divisors is an integer number (2443499259).

Almost surely, 2^6515998022 is an apocalyptic number.

6515998022 is a deficient number, since it is larger than the sum of its proper divisors (3257999014).

6515998022 is a wasteful number, since it uses less digits than its factorization.

6515998022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257999013.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 6515998022 is about 80721.7320304762. The cubic root of 6515998022 is about 1867.7854213168.

The spelling of 6515998022 in words is "six billion, five hundred fifteen million, nine hundred ninety-eight thousand, twenty-two".