28345634525527 has 16 divisors (see below), whose sum is σ = 31677032167200. Its totient is φ = 25140002982400.

The previous prime is 28345634525491. The next prime is 28345634525543. The reversal of 28345634525527 is 72552543654382.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28345634525527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345634525027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56790849 + ... + 57287797.

It is an arithmetic number, because the mean of its divisors is an integer number (1979814510450).

Almost surely, 2^{28345634525527} is an apocalyptic number.

28345634525527 is a deficient number, since it is larger than the sum of its proper divisors (3331397641673).

28345634525527 is a wasteful number, since it uses less digits than its factorization.

28345634525527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623474.

The product of its digits is 241920000, while the sum is 61.

The spelling of 28345634525527 in words is "twenty-eight trillion, three hundred forty-five billion, six hundred thirty-four million, five hundred twenty-five thousand, five hundred twenty-seven".