6780061515 has 16 divisors (see below), whose sum is σ = 10996704288. Its totient is φ = 3566497536.

The previous prime is 6780061481. The next prime is 6780061529. The reversal of 6780061515 is 5151600876.

It is not a de Polignac number, because 6780061515 - 2⁶ = 6780061451 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3094824 + ... + 3097013.

It is an arithmetic number, because the mean of its divisors is an integer number (687294018).

Almost surely, 2^6780061515 is an apocalyptic number.

6780061515 is a deficient number, since it is larger than the sum of its proper divisors (4216642773).

6780061515 is a wasteful number, since it uses less digits than its factorization.

6780061515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191918.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 6780061515 is about 82341.1289393095. The cubic root of 6780061515 is about 1892.6829857961.

The spelling of 6780061515 in words is "six billion, seven hundred eighty million, sixty-one thousand, five hundred fifteen".