867644361 has 6 divisors (see below), whose sum is σ = 1253264090. Its totient is φ = 578429568.

The previous prime is 867644311. The next prime is 867644389. The reversal of 867644361 is 163446768.

It is a happy number.

867644361 is a `hidden beast` number, since 86 + 76 + 443 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 554885136 + 312759225 = 23556^2 + 17685^2 .

It is not a de Polignac number, because 867644361 - 2⁷ = 867644233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (867644311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48202456 + ... + 48202473.

Almost surely, 2^867644361 is an apocalyptic number.

It is an amenable number.

867644361 is a deficient number, since it is larger than the sum of its proper divisors (385619729).

867644361 is a wasteful number, since it uses less digits than its factorization.

867644361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96404935 (or 96404932 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 867644361 is about 29455.8035198499. The cubic root of 867644361 is about 953.7778875870. Note that the first 3 decimals are identical.

It can be divided in two parts, 86764 and 4361, that added together give a cube (91125 = 45³).

The spelling of 867644361 in words is "eight hundred sixty-seven million, six hundred forty-four thousand, three hundred sixty-one".