491180738516 has 24 divisors (see below), whose sum is σ = 925707939240. Its totient is φ = 226693619712.

The previous prime is 491180738507. The next prime is 491180738551. The reversal of 491180738516 is 615837081194.

It can be written as a sum of positive squares in 4 ways, for example, as 7037532100 + 484143206416 = 83890^2 + 695804^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3091220 + ... + 3246228.

It is an arithmetic number, because the mean of its divisors is an integer number (38571164135).

Almost surely, 2^491180738516 is an apocalyptic number.

It is an amenable number.

491180738516 is a deficient number, since it is larger than the sum of its proper divisors (434527200724).

491180738516 is a wasteful number, since it uses less digits than its factorization.

491180738516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215963 (or 215961 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 491180738516 in words is "four hundred ninety-one billion, one hundred eighty million, seven hundred thirty-eight thousand, five hundred sixteen".