28601571457405 has 4 divisors (see below), whose sum is σ = 34321885748892. Its totient is φ = 22881257165920.

The previous prime is 28601571457391. The next prime is 28601571457451. The reversal of 28601571457405 is 50475417510682.

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 7883398292121 + 20718173165284 = 2807739^2 + 4551722^2 .

It is not a de Polignac number, because 28601571457405 - 2¹¹ = 28601571455357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860157145736 + ... + 2860157145745.

It is an arithmetic number, because the mean of its divisors is an integer number (8580471437223).

Almost surely, 2^{28601571457405} is an apocalyptic number.

It is an amenable number.

28601571457405 is a deficient number, since it is larger than the sum of its proper divisors (5720314291487).

28601571457405 is an equidigital number, since it uses as much as digits as its factorization.

28601571457405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720314291486.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 28601571457405 in words is "twenty-eight trillion, six hundred one billion, five hundred seventy-one million, four hundred fifty-seven thousand, four hundred five".