11956014721 has 16 divisors (see below), whose sum is σ = 14643465984. Its totient is φ = 9537511104.

The previous prime is 11956014709. The next prime is 11956014731. The reversal of 11956014721 is 12741065911.

It is a cyclic number.

It is not a de Polignac number, because 11956014721 - 2¹⁷ = 11955883649 is a prime.

It is a super-3 number, since 3×11956014721³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (11956014731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 997570 + ... + 1009483.

It is an arithmetic number, because the mean of its divisors is an integer number (915216624).

Almost surely, 2^11956014721 is an apocalyptic number.

It is an amenable number.

11956014721 is a deficient number, since it is larger than the sum of its proper divisors (2687451263).

11956014721 is a wasteful number, since it uses less digits than its factorization.

11956014721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007120.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 11956014721 in words is "eleven billion, nine hundred fifty-six million, fourteen thousand, seven hundred twenty-one".