11851418797 has 2 divisors, whose sum is σ = 11851418798. Its totient is φ = 11851418796.

The previous prime is 11851418779. The next prime is 11851418807. The reversal of 11851418797 is 79781415811.

Together with previous prime (11851418779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7489344681 + 4362074116 = 86541^2 + 66046^2 .

It is a cyclic number.

It is not a de Polignac number, because 11851418797 - 2³¹ = 9703935149 is a prime.

It is a super-2 number, since 2×11851418797² (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 (11851418717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5925709398 + 5925709399.

It is an arithmetic number, because the mean of its divisors is an integer number (5925709399).

Almost surely, 2^11851418797 is an apocalyptic number.

It is an amenable number.

11851418797 is a deficient number, since it is larger than the sum of its proper divisors (1).

11851418797 is an equidigital number, since it uses as much as digits as its factorization.

11851418797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 52.

The spelling of 11851418797 in words is "eleven billion, eight hundred fifty-one million, four hundred eighteen thousand, seven hundred ninety-seven".