28542918868993 has 32 divisors (see below), whose sum is σ = 29019374616960. Its totient is φ = 28072224576000.

The previous prime is 28542918868957. The next prime is 28542918869071. The reversal of 28542918868993 is 39986881924582.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28542918868993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28542918868393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4239253855 + ... + 4239260587.

It is an arithmetic number, because the mean of its divisors is an integer number (906855456780).

Almost surely, 2^{28542918868993} is an apocalyptic number.

It is an amenable number.

28542918868993 is a deficient number, since it is larger than the sum of its proper divisors (476455747967).

28542918868993 is a wasteful number, since it uses less digits than its factorization.

28542918868993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7809.

The product of its digits is 4299816960, while the sum is 82.

The spelling of 28542918868993 in words is "twenty-eight trillion, five hundred forty-two billion, nine hundred eighteen million, eight hundred sixty-eight thousand, nine hundred ninety-three".