11908271261 has 6 divisors (see below), whose sum is σ = 12568009662. Its totient is φ = 11281519800.

The previous prime is 11908271257. The next prime is 11908271293. The reversal of 11908271261 is 16217280911.

It can be written as a sum of positive squares in only one way, i.e., 10801444900 + 1106826361 = 103930^2 + 33269^2 .

It is not a de Polignac number, because 11908271261 - 2² = 11908271257 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 (11908571261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16493090 + ... + 16493811.

It is an arithmetic number, because the mean of its divisors is an integer number (2094668277).

Almost surely, 2^11908271261 is an apocalyptic number.

It is an amenable number.

11908271261 is a deficient number, since it is larger than the sum of its proper divisors (659738401).

11908271261 is an equidigital number, since it uses as much as digits as its factorization.

11908271261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32986939 (or 32986920 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 38.

The spelling of 11908271261 in words is "eleven billion, nine hundred eight million, two hundred seventy-one thousand, two hundred sixty-one".