11863799261 has 2 divisors, whose sum is σ = 11863799262. Its totient is φ = 11863799260.

The previous prime is 11863799249. The next prime is 11863799279. The reversal of 11863799261 is 16299736811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11434024900 + 429774361 = 106930^2 + 20731^2 .

It is an emirp because it is prime and its reverse (16299736811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11863799261 - 2²⁶ = 11796690397 is a prime.

It is a super-2 number, since 2×11863799261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11863799221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5931899630 + 5931899631.

It is an arithmetic number, because the mean of its divisors is an integer number (5931899631).

Almost surely, 2^11863799261 is an apocalyptic number.

It is an amenable number.

11863799261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11863799261 is an equidigital number, since it uses as much as digits as its factorization.

11863799261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The spelling of 11863799261 in words is "eleven billion, eight hundred sixty-three million, seven hundred ninety-nine thousand, two hundred sixty-one".