11507281994 has 12 divisors (see below), whose sum is σ = 18690822486. Its totient is φ = 5311053072.

The previous prime is 11507281993. The next prime is 11507282011. The reversal of 11507281994 is 49918270511.

It can be written as a sum of positive squares in 3 ways, for example, as 3494346769 + 8012935225 = 59113^2 + 89515^2 .

It is not an unprimeable number, because it can be changed into a prime (11507281993) 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, 17022269 + ... + 17022944.

Almost surely, 2^11507281994 is an apocalyptic number.

11507281994 is a deficient number, since it is larger than the sum of its proper divisors (7183540492).

11507281994 is a wasteful number, since it uses less digits than its factorization.

11507281994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34045241 (or 34045228 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 11507281994 in words is "eleven billion, five hundred seven million, two hundred eighty-one thousand, nine hundred ninety-four".