11451140644 has 6 divisors (see below), whose sum is σ = 20039496134. Its totient is φ = 5725570320.

The previous prime is 11451140599. The next prime is 11451140707. The reversal of 11451140644 is 44604115411.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7597214244 + 3853926400 = 87162^2 + 62080^2 .

It is a super-2 number, since 2×11451140644² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1431392577 + ... + 1431392584.

Almost surely, 2^11451140644 is an apocalyptic number.

It is an amenable number.

11451140644 is a deficient number, since it is larger than the sum of its proper divisors (8588355490).

11451140644 is a wasteful number, since it uses less digits than its factorization.

11451140644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862785165 (or 2862785163 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 11451140644 in words is "eleven billion, four hundred fifty-one million, one hundred forty thousand, six hundred forty-four".