11507281993 has 2 divisors, whose sum is σ = 11507281994. Its totient is φ = 11507281992.

The previous prime is 11507281969. The next prime is 11507282011. The reversal of 11507281993 is 39918270511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11507281984 + 9 = 107272^2 + 3^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11507281993 is a prime.

It is not a weakly prime, because it can be changed into another prime (11507221993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753640996 + 5753640997.

It is an arithmetic number, because the mean of its divisors is an integer number (5753640997).

Almost surely, 2^11507281993 is an apocalyptic number.

It is an amenable number.

11507281993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11507281993 is an equidigital number, since it uses as much as digits as its factorization.

11507281993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 11507281993 in words is "eleven billion, five hundred seven million, two hundred eighty-one thousand, nine hundred ninety-three".