28107544465 has 64 divisors (see below), whose sum is σ = 46391450112. Its totient is φ = 15779174400.

The previous prime is 28107544457. The next prime is 28107544469. The reversal of 28107544465 is 56444570182.

It is not a de Polignac number, because 28107544465 - 2³ = 28107544457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28107544469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 136719 + ... + 273691.

It is an arithmetic number, because the mean of its divisors is an integer number (724866408).

Almost surely, 2^28107544465 is an apocalyptic number.

It is an amenable number.

28107544465 is a deficient number, since it is larger than the sum of its proper divisors (18283905647).

28107544465 is a wasteful number, since it uses less digits than its factorization.

28107544465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137050.

The product of its (nonzero) digits is 1075200, while the sum is 46.

The spelling of 28107544465 in words is "twenty-eight billion, one hundred seven million, five hundred forty-four thousand, four hundred sixty-five".