28155168068 has 24 divisors (see below), whose sum is σ = 51002703360. Its totient is φ = 13585498560.

The previous prime is 28155168053. The next prime is 28155168071. The reversal of 28155168068 is 86086155182.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271721 + ... + 360752.

It is an arithmetic number, because the mean of its divisors is an integer number (2125112640).

Almost surely, 2^28155168068 is an apocalyptic number.

It is an amenable number.

28155168068 is a deficient number, since it is larger than the sum of its proper divisors (22847535292).

28155168068 is a wasteful number, since it uses less digits than its factorization.

28155168068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632867 (or 632865 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 50.

The spelling of 28155168068 in words is "twenty-eight billion, one hundred fifty-five million, one hundred sixty-eight thousand, sixty-eight".