491203520701 has 4 divisors (see below), whose sum is σ = 517056337600. Its totient is φ = 465350703804.

The previous prime is 491203520669. The next prime is 491203520741. The reversal of 491203520701 is 107025302194.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 491203520701 - 2⁵ = 491203520669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491203520741) 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, 12926408421 + ... + 12926408458.

It is an arithmetic number, because the mean of its divisors is an integer number (129264084400).

Almost surely, 2^491203520701 is an apocalyptic number.

It is an amenable number.

491203520701 is a deficient number, since it is larger than the sum of its proper divisors (25852816899).

491203520701 is a wasteful number, since it uses less digits than its factorization.

491203520701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25852816898.

The product of its (nonzero) digits is 15120, while the sum is 34.

Adding to 491203520701 its reverse (107025302194), we get a palindrome (598228822895).

The spelling of 491203520701 in words is "four hundred ninety-one billion, two hundred three million, five hundred twenty thousand, seven hundred one".