6515878947 has 8 divisors (see below), whose sum is σ = 8785455120. Its totient is φ = 4295111040.

The previous prime is 6515878937. The next prime is 6515878951. The reversal of 6515878947 is 7498785156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6515878947 - 2¹⁶ = 6515813411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6515878937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12201754 + ... + 12202287.

It is an arithmetic number, because the mean of its divisors is an integer number (1098181890).

Almost surely, 2^6515878947 is an apocalyptic number.

6515878947 is a deficient number, since it is larger than the sum of its proper divisors (2269576173).

6515878947 is a wasteful number, since it uses less digits than its factorization.

6515878947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24404133.

The product of its digits is 16934400, while the sum is 60.

The square root of 6515878947 is about 80720.9944624074. The cubic root of 6515878947 is about 1867.7740437861.

The spelling of 6515878947 in words is "six billion, five hundred fifteen million, eight hundred seventy-eight thousand, nine hundred forty-seven".