28097199945 has 16 divisors (see below), whose sum is σ = 49950577920. Its totient is φ = 14985173232.

The previous prime is 28097199941. The next prime is 28097199989. The reversal of 28097199945 is 54999179082.

It is not a de Polignac number, because 28097199945 - 2² = 28097199941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28097199941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104063569 + ... + 104063838.

It is an arithmetic number, because the mean of its divisors is an integer number (3121911120).

Almost surely, 2^28097199945 is an apocalyptic number.

It is an amenable number.

28097199945 is a deficient number, since it is larger than the sum of its proper divisors (21853377975).

28097199945 is a wasteful number, since it uses less digits than its factorization.

28097199945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208127421 (or 208127415 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 63.

The spelling of 28097199945 in words is "twenty-eight billion, ninety-seven million, one hundred ninety-nine thousand, nine hundred forty-five".