28077332155 has 8 divisors (see below), whose sum is σ = 34603414992. Its totient is φ = 21854788128.

The previous prime is 28077332123. The next prime is 28077332167. The reversal of 28077332155 is 55123377082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28077332155 - 2⁵ = 28077332123 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 75884497 + ... + 75884866.

It is an arithmetic number, because the mean of its divisors is an integer number (4325426874).

Almost surely, 2^28077332155 is an apocalyptic number.

28077332155 is a deficient number, since it is larger than the sum of its proper divisors (6526082837).

28077332155 is a wasteful number, since it uses less digits than its factorization.

28077332155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151769405.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 28077332155 in words is "twenty-eight billion, seventy-seven million, three hundred thirty-two thousand, one hundred fifty-five".