5166644436 has 18 divisors (see below), whose sum is σ = 13060129082. Its totient is φ = 1722214800.

The previous prime is 5166644411. The next prime is 5166644449. The reversal of 5166644436 is 6344466615.

It can be written as a sum of positive squares in only one way, i.e., 4686771600 + 479872836 = 68460^2 + 21906^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 5166644391 and 5166644400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71758915 + ... + 71758986.

Almost surely, 2^5166644436 is an apocalyptic number.

It is an amenable number.

5166644436 is an abundant number, since it is smaller than the sum of its proper divisors (7893484646).

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

5166644436 is a wasteful number, since it uses less digits than its factorization.

5166644436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143517911 (or 143517906 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 5166644436 is about 71879.3742042876. The cubic root of 5166644436 is about 1728.7659164139.

The spelling of 5166644436 in words is "five billion, one hundred sixty-six million, six hundred forty-four thousand, four hundred thirty-six".