6512232978 has 20 divisors (see below), whose sum is σ = 14592226110. Its totient is φ = 2170744272.

The previous prime is 6512232971. The next prime is 6512233009. The reversal of 6512232978 is 8792322156.

It can be written as a sum of positive squares in only one way, i.e., 6334090569 + 178142409 = 79587^2 + 13347^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6512232971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20099323 + ... + 20099646.

Almost surely, 2^6512232978 is an apocalyptic number.

6512232978 is an abundant number, since it is smaller than the sum of its proper divisors (8079993132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6512232978 is a wasteful number, since it uses less digits than its factorization.

6512232978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40198983 (or 40198974 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 6512232978 is about 80698.4075307561. The cubic root of 6512232978 is about 1867.4256069461.

The spelling of 6512232978 in words is "six billion, five hundred twelve million, two hundred thirty-two thousand, nine hundred seventy-eight".