28131571801 has 8 divisors (see below), whose sum is σ = 28299049920. Its totient is φ = 27964208688.

The previous prime is 28131571751. The next prime is 28131571873. The reversal of 28131571801 is 10817513182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28131571801 - 2⁷ = 28131571673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28131511801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489555 + ... + 543991.

It is an arithmetic number, because the mean of its divisors is an integer number (3537381240).

Almost surely, 2^28131571801 is an apocalyptic number.

It is an amenable number.

28131571801 is a deficient number, since it is larger than the sum of its proper divisors (167478119).

28131571801 is a wasteful number, since it uses less digits than its factorization.

28131571801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57503.

The product of its (nonzero) digits is 13440, while the sum is 37.

The spelling of 28131571801 in words is "twenty-eight billion, one hundred thirty-one million, five hundred seventy-one thousand, eight hundred one".