491481389254 has 16 divisors (see below), whose sum is σ = 739536489936. Its totient is φ = 244969401600.

The previous prime is 491481389251. The next prime is 491481389257. The reversal of 491481389254 is 452983184194.

It is an interprime number because it is at equal distance from previous prime (491481389251) and next prime (491481389257).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491481389251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6263914 + ... + 6341890.

It is an arithmetic number, because the mean of its divisors is an integer number (46221030621).

Almost surely, 2^491481389254 is an apocalyptic number.

491481389254 is a deficient number, since it is larger than the sum of its proper divisors (248055100682).

491481389254 is a wasteful number, since it uses less digits than its factorization.

491481389254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87831.

The product of its digits is 9953280, while the sum is 58.

The spelling of 491481389254 in words is "four hundred ninety-one billion, four hundred eighty-one million, three hundred eighty-nine thousand, two hundred fifty-four".