13721670057 has 4 divisors (see below), whose sum is σ = 18295560080. Its totient is φ = 9147780036.

The previous prime is 13721670047. The next prime is 13721670077. The reversal of 13721670057 is 75007612731.

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.

It is not a de Polignac number, because 13721670057 - 2⁴ = 13721670041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13721669997 and 13721670024.

It is not an unprimeable number, because it can be changed into a prime (13721670047) 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, 2286945007 + ... + 2286945012.

It is an arithmetic number, because the mean of its divisors is an integer number (4573890020).

Almost surely, 2^13721670057 is an apocalyptic number.

It is an amenable number.

13721670057 is a deficient number, since it is larger than the sum of its proper divisors (4573890023).

13721670057 is an equidigital number, since it uses as much as digits as its factorization.

13721670057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573890022.

The product of its (nonzero) digits is 61740, while the sum is 39.

The spelling of 13721670057 in words is "thirteen billion, seven hundred twenty-one million, six hundred seventy thousand, fifty-seven".