11390494568 has 8 divisors (see below), whose sum is σ = 21357177330.
Its totient is φ = 5695247280.
The previous prime is 11390494567. The next prime is 11390494613. The reversal of 11390494568 is 86549409311.
It can be written as a sum of positive squares in only one way, i.e., 9560537284 + 1829957284 = 97778^2 + 42778^2
It is a tau number, because it is divible by the number of its divisors (8).
It is a super-3 number, since 3×113904945683 (a number of 31 digits) contains 333 as substring.
It is not an unprimeable number, because it can be changed into a prime (11390494567) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711905903 + ... + 711905918.
Almost surely, 211390494568 is an apocalyptic number.
It is an amenable number.
11390494568 is a deficient number, since it is larger than the sum of its proper divisors (9966682762).
11390494568 is a wasteful number, since it uses less digits than its factorization.
11390494568 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1423811827 (or 1423811823 counting only the distinct ones).
The product of its (nonzero) digits is 933120, while the sum is 50.
The spelling of 11390494568 in words is "eleven billion, three hundred ninety million, four hundred ninety-four thousand, five hundred sixty-eight".