13001720546 has 12 divisors (see below), whose sum is σ = 19877505522. Its totient is φ = 6378199776.

The previous prime is 13001720527. The next prime is 13001720551. The reversal of 13001720546 is 64502710031.

It can be written as a sum of positive squares in 3 ways, for example, as 12964327321 + 37393225 = 113861^2 + 6115^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1151531 + ... + 1162766.

Almost surely, 2^13001720546 is an apocalyptic number.

13001720546 is a deficient number, since it is larger than the sum of its proper divisors (6875784976).

13001720546 is an equidigital number, since it uses as much as digits as its factorization.

13001720546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314405 (or 2314352 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 13001720546 in words is "thirteen billion, one million, seven hundred twenty thousand, five hundred forty-six".