6554971815 has 64 divisors (see below), whose sum is σ = 12515712000. Its totient is φ = 2926772352.

The previous prime is 6554971783. The next prime is 6554971873. The reversal of 6554971815 is 5181794556.

It is not a de Polignac number, because 6554971815 - 2⁵ = 6554971783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206421 + ... + 236049.

It is an arithmetic number, because the mean of its divisors is an integer number (195558000).

Almost surely, 2^6554971815 is an apocalyptic number.

6554971815 is a deficient number, since it is larger than the sum of its proper divisors (5960740185).

6554971815 is a wasteful number, since it uses less digits than its factorization.

6554971815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29701 (or 29687 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 51.

The square root of 6554971815 is about 80962.7804302693. The cubic root of 6554971815 is about 1871.5019166342.

The spelling of 6554971815 in words is "six billion, five hundred fifty-four million, nine hundred seventy-one thousand, eight hundred fifteen".