261008010587 has 2 divisors, whose sum is σ = 261008010588. Its totient is φ = 261008010586.

The previous prime is 261008010581. The next prime is 261008010643. The reversal of 261008010587 is 785010800162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261008010587 - 2³² = 256713043291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261008010587.

It is not a weakly prime, because it can be changed into another prime (261008010581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130504005293 + 130504005294.

It is an arithmetic number, because the mean of its divisors is an integer number (130504005294).

Almost surely, 2^261008010587 is an apocalyptic number.

261008010587 is a deficient number, since it is larger than the sum of its proper divisors (1).

261008010587 is an equidigital number, since it uses as much as digits as its factorization.

261008010587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 261008010587 in words is "two hundred sixty-one billion, eight million, ten thousand, five hundred eighty-seven".