28503475978816 has 28 divisors (see below), whose sum is σ = 56635137369580. Its totient is φ = 14233205145600.

The previous prime is 28503475978787. The next prime is 28503475978823. The reversal of 28503475978816 is 61887957430582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4213560868416 + 24289915110400 = 2052696^2 + 4928480^2 .

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, 289526085 + ... + 289624516.

It is an arithmetic number, because the mean of its divisors is an integer number (2022683477485).

It is a 1-persistent number, because it is pandigital, but 2⋅28503475978816 = 57006951957632 is not.

Almost surely, 2^{28503475978816} is an apocalyptic number.

It is an amenable number.

28503475978816 is a deficient number, since it is larger than the sum of its proper divisors (28131661390764).

28503475978816 is an equidigital number, since it uses as much as digits as its factorization.

28503475978816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579151382 (or 579151372 counting only the distinct ones).

The product of its (nonzero) digits is 812851200, while the sum is 73.

The spelling of 28503475978816 in words is "twenty-eight trillion, five hundred three billion, four hundred seventy-five million, nine hundred seventy-eight thousand, eight hundred sixteen".