491315184360 has 1920 divisors, whose sum is σ = 2289664143360. Its totient is φ = 91707033600.

The previous prime is 491315184329. The next prime is 491315184377. The reversal of 491315184360 is 63481513194.

491315184360 is a `hidden beast` number, since 4 + 9 + 1 + 31 + 518 + 43 + 60 = 666.

It is a super-2 number, since 2×491315184360² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 1812971025 + ... + 1812971295.

It is an arithmetic number, because the mean of its divisors is an integer number (1192533408).

Almost surely, 2^491315184360 is an apocalyptic number.

491315184360 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491315184360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144832071680).

491315184360 is an abundant number, since it is smaller than the sum of its proper divisors (1798348959000).

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

491315184360 is a wasteful number, since it uses less digits than its factorization.

491315184360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 491315184360 in words is "four hundred ninety-one billion, three hundred fifteen million, one hundred eighty-four thousand, three hundred sixty".