13406721545 has 8 divisors (see below), whose sum is σ = 18386361024. Its totient is φ = 9193180464.

The previous prime is 13406721539. The next prime is 13406721563. The reversal of 13406721545 is 54512760431.

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 13406721545 - 2⁴ = 13406721529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13406721499 and 13406721508.

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, 191524559 + ... + 191524628.

It is an arithmetic number, because the mean of its divisors is an integer number (2298295128).

Almost surely, 2^13406721545 is an apocalyptic number.

It is an amenable number.

13406721545 is a deficient number, since it is larger than the sum of its proper divisors (4979639479).

13406721545 is an equidigital number, since it uses as much as digits as its factorization.

13406721545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383049199.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 13406721545 in words is "thirteen billion, four hundred six million, seven hundred twenty-one thousand, five hundred forty-five".