28365455231616 has 32 divisors (see below), whose sum is σ = 75345740460000. Its totient is φ = 9455151743744.

The previous prime is 28365455231563. The next prime is 28365455231627. The reversal of 28365455231616 is 61613255456382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36934186116 + ... + 36934186883.

It is an arithmetic number, because the mean of its divisors is an integer number (2354554389375).

Almost surely, 2^{28365455231616} is an apocalyptic number.

It is an amenable number.

28365455231616 is an abundant number, since it is smaller than the sum of its proper divisors (46980285228384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28365455231616 is an equidigital number, since it uses as much as digits as its factorization.

28365455231616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73868373016 (or 73868373004 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 57.

The spelling of 28365455231616 in words is "twenty-eight trillion, three hundred sixty-five billion, four hundred fifty-five million, two hundred thirty-one thousand, six hundred sixteen".