28664370281755 has 32 divisors (see below), whose sum is σ = 37304640180864. Its totient is φ = 21018652409856.

The previous prime is 28664370281741. The next prime is 28664370281791. The reversal of 28664370281755 is 55718207346682.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28664370281755 is a prime.

It is a super-2 number, since 2×28664370281755² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2588994 + ... + 8001976.

It is an arithmetic number, because the mean of its divisors is an integer number (1165770005652).

Almost surely, 2^{28664370281755} is an apocalyptic number.

28664370281755 is a deficient number, since it is larger than the sum of its proper divisors (8640269899109).

28664370281755 is a wasteful number, since it uses less digits than its factorization.

28664370281755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413575.

The product of its (nonzero) digits is 135475200, while the sum is 64.

The spelling of 28664370281755 in words is "twenty-eight trillion, six hundred sixty-four billion, three hundred seventy million, two hundred eighty-one thousand, seven hundred fifty-five".