11745633557 has 16 divisors (see below), whose sum is σ = 14243968512. Its totient is φ = 9454959360.

The previous prime is 11745633553. The next prime is 11745633569. The reversal of 11745633557 is 75533654711.

It is not a de Polignac number, because 11745633557 - 2² = 11745633553 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 (11745633553) 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, 51494 + ... + 161687.

It is an arithmetic number, because the mean of its divisors is an integer number (890248032).

Almost surely, 2^11745633557 is an apocalyptic number.

11745633557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11745633557 is a deficient number, since it is larger than the sum of its proper divisors (2498334955).

11745633557 is a wasteful number, since it uses less digits than its factorization.

11745633557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213668.

The product of its digits is 1323000, while the sum is 47.

The spelling of 11745633557 in words is "eleven billion, seven hundred forty-five million, six hundred thirty-three thousand, five hundred fifty-seven".