8856641575477 has 4 divisors (see below), whose sum is σ = 8988830255776. Its totient is φ = 8724452895180.

The previous prime is 8856641575471. The next prime is 8856641575489. The reversal of 8856641575477 is 7745751466588.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8856641575477 - 2¹⁹ = 8856641051189 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 (8856641575471) 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, 66094340049 + ... + 66094340182.

It is an arithmetic number, because the mean of its divisors is an integer number (2247207563944).

Almost surely, 2^{8856641575477} is an apocalyptic number.

It is an amenable number.

8856641575477 is a deficient number, since it is larger than the sum of its proper divisors (132188680299).

8856641575477 is a wasteful number, since it uses less digits than its factorization.

8856641575477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132188680298.

The product of its digits is 1580544000, while the sum is 73.

The spelling of 8856641575477 in words is "eight trillion, eight hundred fifty-six billion, six hundred forty-one million, five hundred seventy-five thousand, four hundred seventy-seven".