11648439437 has 2 divisors, whose sum is σ = 11648439438. Its totient is φ = 11648439436.

The previous prime is 11648439427. The next prime is 11648439469. The reversal of 11648439437 is 73493484611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9358434121 + 2290005316 = 96739^2 + 47854^2 .

It is an emirp because it is prime and its reverse (73493484611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11648439437 - 2¹⁶ = 11648373901 is a prime.

It is a super-2 number, since 2×11648439437² (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 (11648439427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5824219718 + 5824219719.

It is an arithmetic number, because the mean of its divisors is an integer number (5824219719).

Almost surely, 2^11648439437 is an apocalyptic number.

It is an amenable number.

11648439437 is a deficient number, since it is larger than the sum of its proper divisors (1).

11648439437 is an equidigital number, since it uses as much as digits as its factorization.

11648439437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The spelling of 11648439437 in words is "eleven billion, six hundred forty-eight million, four hundred thirty-nine thousand, four hundred thirty-seven".