210013728491 has 12 divisors (see below), whose sum is σ = 244362221640. Its totient is φ = 179967160800.

The previous prime is 210013728473. The next prime is 210013728497. The reversal of 210013728491 is 194827310012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-210013728491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210013728497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330506 + ... + 727503.

It is an arithmetic number, because the mean of its divisors is an integer number (20363518470).

Almost surely, 2^210013728491 is an apocalyptic number.

210013728491 is a deficient number, since it is larger than the sum of its proper divisors (34348493149).

210013728491 is a wasteful number, since it uses less digits than its factorization.

210013728491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062074 (or 1062067 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 210013728491 in words is "two hundred ten billion, thirteen million, seven hundred twenty-eight thousand, four hundred ninety-one".