11768387945 has 16 divisors (see below), whose sum is σ = 14240419920. Its totient is φ = 9336048384.

The previous prime is 11768387929. The next prime is 11768387947. The reversal of 11768387945 is 54978386711.

11768387945 = 76708² + 76709².

It can be written as a sum of positive squares in 8 ways, for example, as 3297856 + 11765090089 = 1816^2 + 108467^2 .

It is a cyclic number.

It is not a de Polignac number, because 11768387945 - 2⁴ = 11768387929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11768387947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384839 + ... + 414291.

It is an arithmetic number, because the mean of its divisors is an integer number (890026245).

Almost surely, 2^11768387945 is an apocalyptic number.

11768387945 is the 76709-th centered square number.

It is an amenable number.

11768387945 is a deficient number, since it is larger than the sum of its proper divisors (2472031975).

11768387945 is a wasteful number, since it uses less digits than its factorization.

11768387945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30124.

The product of its digits is 10160640, while the sum is 59.

The spelling of 11768387945 in words is "eleven billion, seven hundred sixty-eight million, three hundred eighty-seven thousand, nine hundred forty-five".