11515143968 has 12 divisors (see below), whose sum is σ = 22670439750. Its totient is φ = 5757571968.

The previous prime is 11515143949. The next prime is 11515143973. The reversal of 11515143968 is 86934151511.

It can be written as a sum of positive squares in only one way, i.e., 9344702224 + 2170441744 = 96668^2 + 46588^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 179924093 + ... + 179924156.

Almost surely, 2^11515143968 is an apocalyptic number.

It is an amenable number.

11515143968 is a deficient number, since it is larger than the sum of its proper divisors (11155295782).

11515143968 is an equidigital number, since it uses as much as digits as its factorization.

11515143968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359848259 (or 359848251 counting only the distinct ones).

The product of its digits is 129600, while the sum is 44.

The spelling of 11515143968 in words is "eleven billion, five hundred fifteen million, one hundred forty-three thousand, nine hundred sixty-eight".