11545549972 has 12 divisors (see below), whose sum is σ = 22041504576. Its totient is φ = 5247977240.

The previous prime is 11545549927. The next prime is 11545549991. The reversal of 11545549972 is 27994554511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131199388 + ... + 131199475.

It is an arithmetic number, because the mean of its divisors is an integer number (1836792048).

Almost surely, 2^11545549972 is an apocalyptic number.

It is an amenable number.

11545549972 is a deficient number, since it is larger than the sum of its proper divisors (10495954604).

11545549972 is a wasteful number, since it uses less digits than its factorization.

11545549972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262398878 (or 262398876 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 52.

The spelling of 11545549972 in words is "eleven billion, five hundred forty-five million, five hundred forty-nine thousand, nine hundred seventy-two".