2728647491273 has 12 divisors (see below), whose sum is σ = 3004102568880. Its totient is φ = 2476581147480.

The previous prime is 2728647491231. The next prime is 2728647491347. The reversal of 2728647491273 is 3721947468272.

It is not a de Polignac number, because 2728647491273 - 2¹⁶ = 2728647425737 is a prime.

It is a super-2 number, since 2×2728647491273² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728647491173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18140615 + ... + 18290412.

It is an arithmetic number, because the mean of its divisors is an integer number (250341880740).

Almost surely, 2^{2728647491273} is an apocalyptic number.

It is an amenable number.

2728647491273 is a deficient number, since it is larger than the sum of its proper divisors (275455077607).

2728647491273 is a wasteful number, since it uses less digits than its factorization.

2728647491273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36431668 (or 36431657 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 62.

The spelling of 2728647491273 in words is "two trillion, seven hundred twenty-eight billion, six hundred forty-seven million, four hundred ninety-one thousand, two hundred seventy-three".