5266321642 has 32 divisors (see below), whose sum is σ = 8682584400. Its totient is φ = 2384514048.

The previous prime is 5266321639. The next prime is 5266321649. The reversal of 5266321642 is 2461236625.

It can be written as a sum of positive squares in 8 ways, for example, as 5262196681 + 4124961 = 72541^2 + 2031^2 .

It is not an unprimeable number, because it can be changed into a prime (5266321649) 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, 279784 + ... + 298012.

Almost surely, 2^5266321642 is an apocalyptic number.

5266321642 is a deficient number, since it is larger than the sum of its proper divisors (3416262758).

5266321642 is a wasteful number, since it uses less digits than its factorization.

5266321642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18570.

The product of its digits is 103680, while the sum is 37.

The square root of 5266321642 is about 72569.4263584879. The cubic root of 5266321642 is about 1739.8125532430.

It can be divided in two parts, 52663 and 21642, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 5266321642 in words is "five billion, two hundred sixty-six million, three hundred twenty-one thousand, six hundred forty-two".