26129138570 has 8 divisors (see below), whose sum is σ = 47032449444. Its totient is φ = 10451655424.

The previous prime is 26129138549. The next prime is 26129138579. The reversal of 26129138570 is 7583192162.

It can be written as a sum of positive squares in 2 ways, for example, as 21320964289 + 4808174281 = 146017^2 + 69341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (26129138579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306456919 + ... + 1306456938.

Almost surely, 2^26129138570 is an apocalyptic number.

26129138570 is a deficient number, since it is larger than the sum of its proper divisors (20903310874).

26129138570 is a wasteful number, since it uses less digits than its factorization.

26129138570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612913864.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 26129138570 in words is "twenty-six billion, one hundred twenty-nine million, one hundred thirty-eight thousand, five hundred seventy".