869646556 has 12 divisors (see below), whose sum is σ = 1522150168. Its totient is φ = 434746512.

The previous prime is 869646551. The next prime is 869646559. The reversal of 869646556 is 655646968.

It is a super-2 number, since 2×869646556² = 1512570264725322272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 869646497 and 869646506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869646551) 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, 11890 + ... + 43366.

Almost surely, 2^869646556 is an apocalyptic number.

It is an amenable number.

869646556 is a deficient number, since it is larger than the sum of its proper divisors (652503612).

869646556 is a wasteful number, since it uses less digits than its factorization.

869646556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38388 (or 38386 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 55.

The square root of 869646556 is about 29489.7703619408. The cubic root of 869646556 is about 954.5109768447.

The spelling of 869646556 in words is "eight hundred sixty-nine million, six hundred forty-six thousand, five hundred fifty-six".