13975933644 has 24 divisors (see below), whose sum is σ = 36233902320. Its totient is φ = 4658644512.

The previous prime is 13975933627. The next prime is 13975933651. The reversal of 13975933644 is 44633957931.

13975933644 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 593 + 3 + 6 + 44 = 666.

It is a super-2 number, since 2×13975933644² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64703289 + ... + 64703504.

It is an arithmetic number, because the mean of its divisors is an integer number (1509745930).

Almost surely, 2^13975933644 is an apocalyptic number.

It is an amenable number.

13975933644 is an abundant number, since it is smaller than the sum of its proper divisors (22257968676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13975933644 is a wasteful number, since it uses less digits than its factorization.

13975933644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129406806 (or 129406798 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 13975933644 in words is "thirteen billion, nine hundred seventy-five million, nine hundred thirty-three thousand, six hundred forty-four".