491367391482240 has 4096 divisors, whose sum is σ = 2340996940800000. Its totient is φ = 94477871480832.

The previous prime is 491367391482223. The next prime is 491367391482241. The reversal of 491367391482240 is 42284193763194.

491367391482240 is a `hidden beast` number, since 4 + 9 + 1 + 3 + 67 + 3 + 91 + 482 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491367391482241) by changing a digit.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 274660363266 + ... + 274660365054.

It is an arithmetic number, because the mean of its divisors is an integer number (571532456250).

Almost surely, 2^{491367391482240} is an apocalyptic number.

491367391482240 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 491367391482240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170498470400000).

491367391482240 is an abundant number, since it is smaller than the sum of its proper divisors (1849629549317760).

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

491367391482240 is a wasteful number, since it uses less digits than its factorization.

491367391482240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2184 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 491367391482240 in words is "four hundred ninety-one trillion, three hundred sixty-seven billion, three hundred ninety-one million, four hundred eighty-two thousand, two hundred forty".