28321671653 has 8 divisors (see below), whose sum is σ = 30933648480. Its totient is φ = 25715908080.

The previous prime is 28321671613. The next prime is 28321671659. The reversal of 28321671653 is 35617612382.

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 28321671653 - 2¹² = 28321667557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321671659) 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, 1543775 + ... + 1562012.

It is an arithmetic number, because the mean of its divisors is an integer number (3866706060).

Almost surely, 2^28321671653 is an apocalyptic number.

It is an amenable number.

28321671653 is a deficient number, since it is larger than the sum of its proper divisors (2611976827).

28321671653 is a wasteful number, since it uses less digits than its factorization.

28321671653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106627.

The product of its digits is 362880, while the sum is 44.

The spelling of 28321671653 in words is "twenty-eight billion, three hundred twenty-one million, six hundred seventy-one thousand, six hundred fifty-three".