6516840337878 has 32 divisors (see below), whose sum is σ = 14041457127936. Its totient is φ = 2004440838048.

The previous prime is 6516840337853. The next prime is 6516840337961. The reversal of 6516840337878 is 8787330486156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15220926 + ... + 15643217.

It is an arithmetic number, because the mean of its divisors is an integer number (438795535248).

Almost surely, 2^{6516840337878} is an apocalyptic number.

6516840337878 is an abundant number, since it is smaller than the sum of its proper divisors (7524616790058).

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

6516840337878 is a wasteful number, since it uses less digits than its factorization.

6516840337878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30866868.

The product of its (nonzero) digits is 162570240, while the sum is 66.

The spelling of 6516840337878 in words is "six trillion, five hundred sixteen billion, eight hundred forty million, three hundred thirty-seven thousand, eight hundred seventy-eight".