11201671765 has 4 divisors (see below), whose sum is σ = 13442006124. Its totient is φ = 8961337408.

The previous prime is 11201671729. The next prime is 11201671771. The reversal of 11201671765 is 56717610211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56717610211 = 811 ⋅69935401.

It can be written as a sum of positive squares in 2 ways, for example, as 8937244369 + 2264427396 = 94537^2 + 47586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201671765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120167172 + ... + 1120167181.

It is an arithmetic number, because the mean of its divisors is an integer number (3360501531).

Almost surely, 2^11201671765 is an apocalyptic number.

It is an amenable number.

11201671765 is a deficient number, since it is larger than the sum of its proper divisors (2240334359).

11201671765 is an equidigital number, since it uses as much as digits as its factorization.

11201671765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240334358.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 11201671765 in words is "eleven billion, two hundred one million, six hundred seventy-one thousand, seven hundred sixty-five".