5638162861 has 16 divisors (see below), whose sum is σ = 5873434560. Its totient is φ = 5405742720.

The previous prime is 5638162853. The next prime is 5638162867. The reversal of 5638162861 is 1682618365.

It is a cyclic number.

It is not a de Polignac number, because 5638162861 - 2³ = 5638162853 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 (5638162867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3933801 + ... + 3935233.

It is an arithmetic number, because the mean of its divisors is an integer number (367089660).

Almost surely, 2^5638162861 is an apocalyptic number.

It is an amenable number.

5638162861 is a deficient number, since it is larger than the sum of its proper divisors (235271699).

5638162861 is a wasteful number, since it uses less digits than its factorization.

5638162861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 414720, while the sum is 46.

The square root of 5638162861 is about 75087.7011300786. The cubic root of 5638162861 is about 1779.8327980176.

The spelling of 5638162861 in words is "five billion, six hundred thirty-eight million, one hundred sixty-two thousand, eight hundred sixty-one".