13875001645 has 8 divisors (see below), whose sum is σ = 16650844056. Its totient is φ = 11099439936.

The previous prime is 13875001631. The next prime is 13875001663. The reversal of 13875001645 is 54610057831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2418082276 + 11456919369 = 49174^2 + 107037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13875001645 - 2¹¹ = 13874999597 is a prime.

It is a super-3 number, since 3×13875001645³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13875001598 and 13875001607.

It is a congruent number.

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, 60799 + ... + 177331.

It is an arithmetic number, because the mean of its divisors is an integer number (2081355507).

Almost surely, 2^13875001645 is an apocalyptic number.

It is an amenable number.

13875001645 is a deficient number, since it is larger than the sum of its proper divisors (2775842411).

13875001645 is a wasteful number, since it uses less digits than its factorization.

13875001645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140351.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 13875001645 in words is "thirteen billion, eight hundred seventy-five million, one thousand, six hundred forty-five".