869657491444 has 12 divisors (see below), whose sum is σ = 1739314982944. Its totient is φ = 372710353464.

The previous prime is 869657491427. The next prime is 869657491447. The reversal of 869657491444 is 444194756968.

869657491444 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 869657491444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869657491447) 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, 15529598034 + ... + 15529598089.

Almost surely, 2^869657491444 is an apocalyptic number.

It is an amenable number.

869657491444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

869657491444 is a wasteful number, since it uses less digits than its factorization.

869657491444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31059196134 (or 31059196132 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 67.

The spelling of 869657491444 in words is "eight hundred sixty-nine billion, six hundred fifty-seven million, four hundred ninety-one thousand, four hundred forty-four".