6781580516 has 12 divisors (see below), whose sum is σ = 12276999420. Its totient is φ = 3273866400.

The previous prime is 6781580471. The next prime is 6781580563. The reversal of 6781580516 is 6150851876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5767794916 + 1013785600 = 75946^2 + 31840^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29230835 + ... + 29231066.

It is an arithmetic number, because the mean of its divisors is an integer number (1023083285).

Almost surely, 2^6781580516 is an apocalyptic number.

It is an amenable number.

6781580516 is a deficient number, since it is larger than the sum of its proper divisors (5495418904).

6781580516 is a wasteful number, since it uses less digits than its factorization.

6781580516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58461934 (or 58461932 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 6781580516 is about 82350.3522518271. The cubic root of 6781580516 is about 1892.8243204366.

The spelling of 6781580516 in words is "six billion, seven hundred eighty-one million, five hundred eighty thousand, five hundred sixteen".