11611211587 has 2 divisors, whose sum is σ = 11611211588. Its totient is φ = 11611211586.

The previous prime is 11611211551. The next prime is 11611211621. The reversal of 11611211587 is 78511211611.

It is an a-pointer prime, because the next prime (11611211621) can be obtained adding 11611211587 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11611211587 - 2¹⁹ = 11610687299 is a prime.

It is not a weakly prime, because it can be changed into another prime (11611217587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5805605793 + 5805605794.

It is an arithmetic number, because the mean of its divisors is an integer number (5805605794).

Almost surely, 2^11611211587 is an apocalyptic number.

11611211587 is a deficient number, since it is larger than the sum of its proper divisors (1).

11611211587 is an equidigital number, since it uses as much as digits as its factorization.

11611211587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 34.

The spelling of 11611211587 in words is "eleven billion, six hundred eleven million, two hundred eleven thousand, five hundred eighty-seven".