5261162138 has 4 divisors (see below), whose sum is σ = 7891743210. Its totient is φ = 2630581068.

The previous prime is 5261162113. The next prime is 5261162143. The reversal of 5261162138 is 8312611625.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5220496009 + 40666129 = 72253^2 + 6377^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5261162098 and 5261162107.

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 as a sum of consecutive naturals, namely, 1315290533 + ... + 1315290536.

Almost surely, 2^5261162138 is an apocalyptic number.

5261162138 is a deficient number, since it is larger than the sum of its proper divisors (2630581072).

5261162138 is a wasteful number, since it uses less digits than its factorization.

5261162138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630581071.

The product of its digits is 17280, while the sum is 35.

The square root of 5261162138 is about 72533.8689027409. The cubic root of 5261162138 is about 1739.2441930393.

The spelling of 5261162138 in words is "five billion, two hundred sixty-one million, one hundred sixty-two thousand, one hundred thirty-eight".