491695311360 has 320 divisors, whose sum is σ = 1716550133760. Its totient is φ = 119076372480.

The previous prime is 491695311347. The next prime is 491695311433. The reversal of 491695311360 is 63113596194.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103316661 + ... + 103321419.

It is an arithmetic number, because the mean of its divisors is an integer number (5364219168).

Almost surely, 2^491695311360 is an apocalyptic number.

491695311360 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 491695311360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858275066880).

491695311360 is an abundant number, since it is smaller than the sum of its proper divisors (1224854822400).

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

491695311360 is a wasteful number, since it uses less digits than its factorization.

491695311360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6019 (or 6003 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 491695311360 in words is "four hundred ninety-one billion, six hundred ninety-five million, three hundred eleven thousand, three hundred sixty".