491481389253 has 16 divisors (see below), whose sum is σ = 676468703232. Its totient is φ = 317074830000.

The previous prime is 491481389251. The next prime is 491481389257. The reversal of 491481389253 is 352983184194.

It is not a de Polignac number, because 491481389253 - 2¹ = 491481389251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491481389193 and 491481389202.

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 15 ways as a sum of consecutive naturals, for example, 3951808 + ... + 4074278.

It is an arithmetic number, because the mean of its divisors is an integer number (42279293952).

Almost surely, 2^491481389253 is an apocalyptic number.

It is an amenable number.

491481389253 is a deficient number, since it is larger than the sum of its proper divisors (184987313979).

491481389253 is a wasteful number, since it uses less digits than its factorization.

491481389253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165656.

The product of its digits is 7464960, while the sum is 57.

The spelling of 491481389253 in words is "four hundred ninety-one billion, four hundred eighty-one million, three hundred eighty-nine thousand, two hundred fifty-three".