862644461 has 6 divisors (see below), whose sum is σ = 1003484430. Its totient is φ = 739409496.

The previous prime is 862644451. The next prime is 862644473. The reversal of 862644461 is 164446268.

It can be written as a sum of positive squares in only one way, i.e., 817674025 + 44970436 = 28595^2 + 6706^2 .

It is not a de Polignac number, because 862644461 - 2²² = 858450157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862644451) 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, 8802446 + ... + 8802543.

It is an arithmetic number, because the mean of its divisors is an integer number (167247405).

Almost surely, 2^862644461 is an apocalyptic number.

It is an amenable number.

862644461 is a deficient number, since it is larger than the sum of its proper divisors (140839969).

862644461 is a wasteful number, since it uses less digits than its factorization.

862644461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17605003 (or 17604996 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 862644461 is about 29370.8096755946. The cubic root of 862644461 is about 951.9422723069.

The spelling of 862644461 in words is "eight hundred sixty-two million, six hundred forty-four thousand, four hundred sixty-one".