11522117557 has 16 divisors (see below), whose sum is σ = 12328422912. Its totient is φ = 10730269440.

The previous prime is 11522117543. The next prime is 11522117561. The reversal of 11522117557 is 75571122511.

It is not a de Polignac number, because 11522117557 - 2⁷ = 11522117429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11522117507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3274363 + ... + 3277879.

It is an arithmetic number, because the mean of its divisors is an integer number (770526432).

Almost surely, 2^11522117557 is an apocalyptic number.

11522117557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11522117557 is a deficient number, since it is larger than the sum of its proper divisors (806305355).

11522117557 is a wasteful number, since it uses less digits than its factorization.

11522117557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508.

The product of its digits is 24500, while the sum is 37.

The spelling of 11522117557 in words is "eleven billion, five hundred twenty-two million, one hundred seventeen thousand, five hundred fifty-seven".