11577320397 has 6 divisors (see below), whose sum is σ = 16722796142. Its totient is φ = 7718213592.

The previous prime is 11577320393. The next prime is 11577320423. The reversal of 11577320397 is 79302377511.

11577320397 is a `hidden beast` number, since 11 + 577 + 32 + 0 + 39 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10561878441 + 1015441956 = 102771^2 + 31866^2 .

It is not a de Polignac number, because 11577320397 - 2² = 11577320393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11577320393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 643184458 + ... + 643184475.

Almost surely, 2^11577320397 is an apocalyptic number.

It is an amenable number.

11577320397 is a deficient number, since it is larger than the sum of its proper divisors (5145475745).

11577320397 is a wasteful number, since it uses less digits than its factorization.

11577320397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286368939 (or 1286368936 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 45.

The spelling of 11577320397 in words is "eleven billion, five hundred seventy-seven million, three hundred twenty thousand, three hundred ninety-seven".