28495713153581 has 2 divisors, whose sum is σ = 28495713153582. Its totient is φ = 28495713153580.

The previous prime is 28495713153577. The next prime is 28495713153619. The reversal of 28495713153581 is 18535131759482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24666529504681 + 3829183648900 = 4966541^2 + 1956830^2 .

It is a cyclic number.

It is not a de Polignac number, because 28495713153581 - 2² = 28495713153577 is a prime.

It is a super-2 number, since 2×28495713153581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28495713153521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14247856576790 + 14247856576791.

It is an arithmetic number, because the mean of its divisors is an integer number (14247856576791).

Almost surely, 2^{28495713153581} is an apocalyptic number.

It is an amenable number.

28495713153581 is a deficient number, since it is larger than the sum of its proper divisors (1).

28495713153581 is an equidigital number, since it uses as much as digits as its factorization.

28495713153581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288000, while the sum is 62.

The spelling of 28495713153581 in words is "twenty-eight trillion, four hundred ninety-five billion, seven hundred thirteen million, one hundred fifty-three thousand, five hundred eighty-one".