11945654471 has 16 divisors (see below), whose sum is σ = 12291447168. Its totient is φ = 11604902400.

The previous prime is 11945654453. The next prime is 11945654473. The reversal of 11945654471 is 17445654911.

It is a cyclic number.

It is not a de Polignac number, because 11945654471 - 2²⁶ = 11878545607 is a prime.

It is a super-3 number, since 3×11945654471³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11945654473) 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, 2309330 + ... + 2314496.

It is an arithmetic number, because the mean of its divisors is an integer number (768215448).

Almost surely, 2^11945654471 is an apocalyptic number.

11945654471 is a deficient number, since it is larger than the sum of its proper divisors (345792697).

11945654471 is a wasteful number, since it uses less digits than its factorization.

11945654471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642.

The product of its digits is 604800, while the sum is 47.

The spelling of 11945654471 in words is "eleven billion, nine hundred forty-five million, six hundred fifty-four thousand, four hundred seventy-one".