261526115371 has 8 divisors (see below), whose sum is σ = 266499992160. Its totient is φ = 256553698752.

The previous prime is 261526115321. The next prime is 261526115413. The reversal of 261526115371 is 173511625162.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 261526115371 - 2²¹ = 261524018219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261526115311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 723223.

It is an arithmetic number, because the mean of its divisors is an integer number (33312499020).

Almost surely, 2^261526115371 is an apocalyptic number.

261526115371 is a deficient number, since it is larger than the sum of its proper divisors (4973876789).

261526115371 is an equidigital number, since it uses as much as digits as its factorization.

261526115371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730085.

The product of its digits is 75600, while the sum is 40.

The spelling of 261526115371 in words is "two hundred sixty-one billion, five hundred twenty-six million, one hundred fifteen thousand, three hundred seventy-one".