869839380651 has 4 divisors (see below), whose sum is σ = 1159785840872. Its totient is φ = 579892920432.

The previous prime is 869839380649. The next prime is 869839380659. The reversal of 869839380651 is 156083938968.

869839380651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 869839380651 - 2¹ = 869839380649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869839380659) 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, 144973230106 + ... + 144973230111.

It is an arithmetic number, because the mean of its divisors is an integer number (289946460218).

Almost surely, 2^869839380651 is an apocalyptic number.

869839380651 is a deficient number, since it is larger than the sum of its proper divisors (289946460221).

869839380651 is a wasteful number, since it uses less digits than its factorization.

869839380651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289946460220.

The product of its (nonzero) digits is 67184640, while the sum is 66.

The spelling of 869839380651 in words is "eight hundred sixty-nine billion, eight hundred thirty-nine million, three hundred eighty thousand, six hundred fifty-one".