491254777120 has 24 divisors (see below), whose sum is σ = 1160589411324. Its totient is φ = 196501910784.

The previous prime is 491254777081. The next prime is 491254777157. The reversal of 491254777120 is 21777452194.

It can be written as a sum of positive squares in 2 ways, for example, as 457749671184 + 33505105936 = 676572^2 + 183044^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535171019 + ... + 1535171338.

Almost surely, 2^491254777120 is an apocalyptic number.

491254777120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491254777120 is an abundant number, since it is smaller than the sum of its proper divisors (669334634204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491254777120 is a wasteful number, since it uses less digits than its factorization.

491254777120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070342372 (or 3070342364 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 491254777120 in words is "four hundred ninety-one billion, two hundred fifty-four million, seven hundred seventy-seven thousand, one hundred twenty".