13748783557 has 4 divisors (see below), whose sum is σ = 14192292736. Its totient is φ = 13305274380.

The previous prime is 13748783551. The next prime is 13748783567. The reversal of 13748783557 is 75538784731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75538784731 = 193 ⋅391392667.

It is a cyclic number.

It is not a de Polignac number, because 13748783557 - 2¹¹ = 13748781509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13748783551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221754543 + ... + 221754604.

It is an arithmetic number, because the mean of its divisors is an integer number (3548073184).

Almost surely, 2^13748783557 is an apocalyptic number.

It is an amenable number.

13748783557 is a deficient number, since it is larger than the sum of its proper divisors (443509179).

13748783557 is an equidigital number, since it uses as much as digits as its factorization.

13748783557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443509178.

The product of its digits is 19756800, while the sum is 58.

The spelling of 13748783557 in words is "thirteen billion, seven hundred forty-eight million, seven hundred eighty-three thousand, five hundred fifty-seven".