11172172641 has 16 divisors (see below), whose sum is σ = 17025959808. Its totient is φ = 6383462400.

The previous prime is 11172172637. The next prime is 11172172643. The reversal of 11172172641 is 14627127111.

It is not a de Polignac number, because 11172172641 - 2² = 11172172637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11172172643) 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, 262471 + ... + 302051.

It is an arithmetic number, because the mean of its divisors is an integer number (1064122488).

Almost surely, 2^11172172641 is an apocalyptic number.

It is an amenable number.

11172172641 is a deficient number, since it is larger than the sum of its proper divisors (5853787167).

11172172641 is a wasteful number, since it uses less digits than its factorization.

11172172641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53032.

The product of its digits is 4704, while the sum is 33.

Adding to 11172172641 its reverse (14627127111), we get a palindrome (25799299752).

The spelling of 11172172641 in words is "eleven billion, one hundred seventy-two million, one hundred seventy-two thousand, six hundred forty-one".