13954464639 has 6 divisors (see below), whose sum is σ = 20156448936. Its totient is φ = 9302976420.

The previous prime is 13954464613. The next prime is 13954464649. The reversal of 13954464639 is 93646445931.

It is a happy number.

13954464639 is a `hidden beast` number, since 1 + 3 + 9 + 544 + 64 + 6 + 39 = 666.

It is not a de Polignac number, because 13954464639 - 2¹⁵ = 13954431871 is a prime.

It is a super-3 number, since 3×13954464639³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13954464649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 775248027 + ... + 775248044.

It is an arithmetic number, because the mean of its divisors is an integer number (3359408156).

Almost surely, 2^13954464639 is an apocalyptic number.

13954464639 is a deficient number, since it is larger than the sum of its proper divisors (6201984297).

13954464639 is a wasteful number, since it uses less digits than its factorization.

13954464639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550496077 (or 1550496074 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The spelling of 13954464639 in words is "thirteen billion, nine hundred fifty-four million, four hundred sixty-four thousand, six hundred thirty-nine".