28481898086401 has 4 divisors (see below), whose sum is σ = 29019292389972. Its totient is φ = 27944503782832.

The previous prime is 28481898086393. The next prime is 28481898086437. The reversal of 28481898086401 is 10468089818482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14041320480625 + 14440577605776 = 3747175^2 + 3800076^2 .

It is a cyclic number.

It is not a de Polignac number, because 28481898086401 - 2³ = 28481898086393 is a prime.

It is a super-2 number, since 2×28481898086401² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28481898786401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268697151706 + ... + 268697151811.

It is an arithmetic number, because the mean of its divisors is an integer number (7254823097493).

Almost surely, 2^{28481898086401} is an apocalyptic number.

It is an amenable number.

28481898086401 is a deficient number, since it is larger than the sum of its proper divisors (537394303571).

28481898086401 is an equidigital number, since it uses as much as digits as its factorization.

28481898086401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537394303570.

The product of its (nonzero) digits is 56623104, while the sum is 67.

The spelling of 28481898086401 in words is "twenty-eight trillion, four hundred eighty-one billion, eight hundred ninety-eight million, eighty-six thousand, four hundred one".