6868815554 has 16 divisors (see below), whose sum is σ = 10347131808. Its totient is φ = 3419798592.

The previous prime is 6868815523. The next prime is 6868815557. The reversal of 6868815554 is 4555188686.

It is a happy number.

It is a super-2 number, since 2×6868815554² = 94361254229744653832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6868815554.

It is not an unprimeable number, because it can be changed into a prime (6868815557) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 551237 + ... + 563559.

It is an arithmetic number, because the mean of its divisors is an integer number (646695738).

Almost surely, 2^6868815554 is an apocalyptic number.

6868815554 is a deficient number, since it is larger than the sum of its proper divisors (3478316254).

6868815554 is a wasteful number, since it uses less digits than its factorization.

6868815554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489.

The product of its digits is 9216000, while the sum is 56.

The square root of 6868815554 is about 82878.3177556108. The cubic root of 6868815554 is about 1900.9058980189.

The spelling of 6868815554 in words is "six billion, eight hundred sixty-eight million, eight hundred fifteen thousand, five hundred fifty-four".