11810181261 has 8 divisors (see below), whose sum is σ = 15747415264. Its totient is φ = 7873200720.

The previous prime is 11810181239. The next prime is 11810181301. The reversal of 11810181261 is 16218101811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11810181261 - 2¹³ = 11810173069 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 (11810181161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127446 + ... + 199656.

It is an arithmetic number, because the mean of its divisors is an integer number (1968426908).

Almost surely, 2^11810181261 is an apocalyptic number.

It is an amenable number.

11810181261 is a deficient number, since it is larger than the sum of its proper divisors (3937234003).

11810181261 is an equidigital number, since it uses as much as digits as its factorization.

11810181261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126731.

The product of its (nonzero) digits is 768, while the sum is 30.

The spelling of 11810181261 in words is "eleven billion, eight hundred ten million, one hundred eighty-one thousand, two hundred sixty-one".