28075570711691 has 4 divisors (see below), whose sum is σ = 28075965885000. Its totient is φ = 28075175538384.

The previous prime is 28075570711663. The next prime is 28075570711753. The reversal of 28075570711691 is 19611707557082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28075570711691 - 2²² = 28075566517387 is a prime.

It is a super-2 number, since 2×28075570711691² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28075570711691.

It is not an unprimeable number, because it can be changed into a prime (28075570713691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197480066 + ... + 197622183.

It is an arithmetic number, because the mean of its divisors is an integer number (7018991471250).

Almost surely, 2^{28075570711691} is an apocalyptic number.

28075570711691 is a deficient number, since it is larger than the sum of its proper divisors (395173309).

28075570711691 is an equidigital number, since it uses as much as digits as its factorization.

28075570711691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395173308.

The product of its (nonzero) digits is 7408800, while the sum is 59.

The spelling of 28075570711691 in words is "twenty-eight trillion, seventy-five billion, five hundred seventy million, seven hundred eleven thousand, six hundred ninety-one".