28055966529077 has 32 divisors (see below), whose sum is σ = 29775491192832. Its totient is φ = 26382309617664.

The previous prime is 28055966529037. The next prime is 28055966529113. The reversal of 28055966529077 is 77092566955082.

It is a cyclic number.

It is not a de Polignac number, because 28055966529077 - 2²⁴ = 28055949751861 is a prime.

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 28055966529077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055966529007) 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, 227301743 + ... + 227425139.

It is an arithmetic number, because the mean of its divisors is an integer number (930484099776).

Almost surely, 2^{28055966529077} is an apocalyptic number.

It is an amenable number.

28055966529077 is a deficient number, since it is larger than the sum of its proper divisors (1719524663755).

28055966529077 is a wasteful number, since it uses less digits than its factorization.

28055966529077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124197.

The product of its (nonzero) digits is 571536000, while the sum is 71.

The spelling of 28055966529077 in words is "twenty-eight trillion, fifty-five billion, nine hundred sixty-six million, five hundred twenty-nine thousand, seventy-seven".