869597743977 has 24 divisors (see below), whose sum is σ = 1307053185984. Its totient is φ = 577753175088.

The previous prime is 869597743961. The next prime is 869597744003. The reversal of 869597743977 is 779347795968.

869597743977 is a `hidden beast` number, since 8 + 6 + 95 + 97 + 7 + 439 + 7 + 7 = 666.

It is not a de Polignac number, because 869597743977 - 2⁴ = 869597743961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 869597743896 and 869597743905.

It is not an unprimeable number, because it can be changed into a prime (869597743957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6035613 + ... + 6178010.

It is an arithmetic number, because the mean of its divisors is an integer number (54460549416).

Almost surely, 2^869597743977 is an apocalyptic number.

It is an amenable number.

869597743977 is a deficient number, since it is larger than the sum of its proper divisors (437455442007).

869597743977 is a wasteful number, since it uses less digits than its factorization.

869597743977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12213931 (or 12213919 counting only the distinct ones).

The product of its digits is 5040947520, while the sum is 81.

The spelling of 869597743977 in words is "eight hundred sixty-nine billion, five hundred ninety-seven million, seven hundred forty-three thousand, nine hundred seventy-seven".