261526526587 has 8 divisors (see below), whose sum is σ = 265972795200. Its totient is φ = 257080711944.

The previous prime is 261526526567. The next prime is 261526526641. The reversal of 261526526587 is 785625625162.

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 261526526587 - 2¹⁹ = 261526002299 is a prime.

It is a super-2 number, since 2×261526526587² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261526526557) 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, 1170964 + ... + 1376302.

It is an arithmetic number, because the mean of its divisors is an integer number (33246599400).

Almost surely, 2^261526526587 is an apocalyptic number.

261526526587 is a deficient number, since it is larger than the sum of its proper divisors (4446268613).

261526526587 is a wasteful number, since it uses less digits than its factorization.

261526526587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226985.

The product of its digits is 12096000, while the sum is 55.

The spelling of 261526526587 in words is "two hundred sixty-one billion, five hundred twenty-six million, five hundred twenty-six thousand, five hundred eighty-seven".