28294997253601 has 16 divisors (see below), whose sum is σ = 33376529768400. Its totient is φ = 23734421157888.

The previous prime is 28294997253569. The next prime is 28294997253643. The reversal of 28294997253601 is 10635279949282.

It can be written as a sum of positive squares in 8 ways, for example, as 301427352576 + 27993569901025 = 549024^2 + 5290895^2 .

It is a cyclic number.

It is not a de Polignac number, because 28294997253601 - 2⁵ = 28294997253569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28294997251601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2207436036 + ... + 2207448853.

It is an arithmetic number, because the mean of its divisors is an integer number (2086033110525).

It is a 1-persistent number, because it is pandigital, but 2⋅28294997253601 = 56589994507202 is not.

Almost surely, 2^{28294997253601} is an apocalyptic number.

It is an amenable number.

28294997253601 is a deficient number, since it is larger than the sum of its proper divisors (5081532514799).

28294997253601 is a wasteful number, since it uses less digits than its factorization.

28294997253601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414884948.

The product of its (nonzero) digits is 117573120, while the sum is 67.

The spelling of 28294997253601 in words is "twenty-eight trillion, two hundred ninety-four billion, nine hundred ninety-seven million, two hundred fifty-three thousand, six hundred one".