261027853987 has 8 divisors (see below), whose sum is σ = 267105150576. Its totient is φ = 254950870272.

The previous prime is 261027853903. The next prime is 261027853993. The reversal of 261027853987 is 789358720162.

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 261027853987 - 2¹¹ = 261027851939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261027850987) 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, 3033663 + ... + 3118519.

It is an arithmetic number, because the mean of its divisors is an integer number (33388143822).

Almost surely, 2^261027853987 is an apocalyptic number.

261027853987 is a deficient number, since it is larger than the sum of its proper divisors (6077296589).

261027853987 is an equidigital number, since it uses as much as digits as its factorization.

261027853987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156437.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 261027853987 in words is "two hundred sixty-one billion, twenty-seven million, eight hundred fifty-three thousand, nine hundred eighty-seven".