11586615551 has 4 divisors (see below), whose sum is σ = 13241846352. Its totient is φ = 9931384752.

The previous prime is 11586615529. The next prime is 11586615577. The reversal of 11586615551 is 15551668511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15551668511 = 19 ⋅818508869.

It is a cyclic number.

It is not a de Polignac number, because 11586615551 - 2²² = 11582421247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11586615751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827615390 + ... + 827615403.

It is an arithmetic number, because the mean of its divisors is an integer number (3310461588).

Almost surely, 2^11586615551 is an apocalyptic number.

11586615551 is a deficient number, since it is larger than the sum of its proper divisors (1655230801).

11586615551 is an equidigital number, since it uses as much as digits as its factorization.

11586615551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655230800.

The product of its digits is 180000, while the sum is 44.

The spelling of 11586615551 in words is "eleven billion, five hundred eighty-six million, six hundred fifteen thousand, five hundred fifty-one".