28013091347491 has 2 divisors, whose sum is σ = 28013091347492. Its totient is φ = 28013091347490.

The previous prime is 28013091347443. The next prime is 28013091347569. The reversal of 28013091347491 is 19474319031082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28013091347491 - 2¹⁵ = 28013091314723 is a prime.

It is a super-2 number, since 2×28013091347491² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28013091347401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14006545673745 + 14006545673746.

It is an arithmetic number, because the mean of its divisors is an integer number (14006545673746).

Almost surely, 2^{28013091347491} is an apocalyptic number.

28013091347491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28013091347491 is an equidigital number, since it uses as much as digits as its factorization.

28013091347491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 28013091347491 in words is "twenty-eight trillion, thirteen billion, ninety-one million, three hundred forty-seven thousand, four hundred ninety-one".