11985925971 has 24 divisors (see below), whose sum is σ = 16876776000. Its totient is φ = 7565502384.

The previous prime is 11985925967. The next prime is 11985925979. The reversal of 11985925971 is 17952958911.

It is not a de Polignac number, because 11985925971 - 2² = 11985925967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (11985925979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3423780 + ... + 3427278.

It is an arithmetic number, because the mean of its divisors is an integer number (703199000).

Almost surely, 2^11985925971 is an apocalyptic number.

11985925971 is a deficient number, since it is larger than the sum of its proper divisors (4890850029).

11985925971 is a wasteful number, since it uses less digits than its factorization.

11985925971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703 (or 6684 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 57.

The spelling of 11985925971 in words is "eleven billion, nine hundred eighty-five million, nine hundred twenty-five thousand, nine hundred seventy-one".