491481389203 has 16 divisors (see below), whose sum is σ = 591320984320. Its totient is φ = 399053674656.

The previous prime is 491481389197. The next prime is 491481389213. The reversal of 491481389203 is 302983184194.

It is not a de Polignac number, because 491481389203 - 2²⁹ = 490944518291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491481389213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035601 + ... + 1433677.

It is an arithmetic number, because the mean of its divisors is an integer number (36957561520).

Almost surely, 2^491481389203 is an apocalyptic number.

491481389203 is a deficient number, since it is larger than the sum of its proper divisors (99839595117).

491481389203 is a wasteful number, since it uses less digits than its factorization.

491481389203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407386.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 491481389203 in words is "four hundred ninety-one billion, four hundred eighty-one million, three hundred eighty-nine thousand, two hundred three".