11811547457000 has 64 divisors (see below), whose sum is σ = 27675534079440. Its totient is φ = 4718377440000.

The previous prime is 11811547456997. The next prime is 11811547457011. The reversal of 11811547457000 is 75474511811.

It can be written as a sum of positive squares in 8 ways, for example, as 1143654858724 + 10667892598276 = 1069418^2 + 3266174^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7044551 + ... + 8558550.

Almost surely, 2^{11811547457000} is an apocalyptic number.

11811547457000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11811547457000 is an abundant number, since it is smaller than the sum of its proper divisors (15863986622440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11811547457000 is a wasteful number, since it uses less digits than its factorization.

11811547457000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15603879 (or 15603865 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 44.

The spelling of 11811547457000 in words is "eleven trillion, eight hundred eleven billion, five hundred forty-seven million, four hundred fifty-seven thousand".