13870733746561 has 8 divisors (see below), whose sum is σ = 14245952964584. Its totient is φ = 13495532135040.

The previous prime is 13870733746559. The next prime is 13870733746609. The reversal of 13870733746561 is 16564733707831.

It can be written as a sum of positive squares in 4 ways, for example, as 7229882056336 + 6640851690225 = 2688844^2 + 2576985^2 .

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 13870733746561 - 2¹ = 13870733746559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13870733746561.

It is not an unprimeable number, because it can be changed into a prime (13870733746061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2796870 + ... + 5963551.

It is an arithmetic number, because the mean of its divisors is an integer number (1780744120573).

Almost surely, 2^{13870733746561} is an apocalyptic number.

It is an amenable number.

13870733746561 is a deficient number, since it is larger than the sum of its proper divisors (375219218023).

13870733746561 is an equidigital number, since it uses as much as digits as its factorization.

13870733746561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8803251.

The product of its (nonzero) digits is 53343360, while the sum is 61.

The spelling of 13870733746561 in words is "thirteen trillion, eight hundred seventy billion, seven hundred thirty-three million, seven hundred forty-six thousand, five hundred sixty-one".