11501278968488 has 8 divisors (see below), whose sum is σ = 21564898065930. Its totient is φ = 5750639484240.

The previous prime is 11501278968457. The next prime is 11501278968497. The reversal of 11501278968488 is 88486987210511.

It can be written as a sum of positive squares in only one way, i.e., 6416605742404 + 5084673226084 = 2533102^2 + 2254922^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×11501278968488² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718829935523 + ... + 718829935538.

Almost surely, 2^{11501278968488} is an apocalyptic number.

It is an amenable number.

11501278968488 is a deficient number, since it is larger than the sum of its proper divisors (10063619097442).

11501278968488 is a wasteful number, since it uses less digits than its factorization.

11501278968488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437659871067 (or 1437659871063 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 68.

The spelling of 11501278968488 in words is "eleven trillion, five hundred one billion, two hundred seventy-eight million, nine hundred sixty-eight thousand, four hundred eighty-eight".