491494629600 has 1152 divisors, whose sum is σ = 2133988416000. Its totient is φ = 107853742080.

The previous prime is 491494629559. The next prime is 491494629673. The reversal of 491494629600 is 6926494194.

It is a happy number.

491494629600 is a `hidden beast` number, since 4 + 9 + 1 + 4 + 9 + 4 + 6 + 29 + 600 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 90695691 + ... + 90701109.

It is an arithmetic number, because the mean of its divisors is an integer number (1852420500).

Almost surely, 2^491494629600 is an apocalyptic number.

491494629600 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 491494629600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066994208000).

491494629600 is an abundant number, since it is smaller than the sum of its proper divisors (1642493786400).

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

491494629600 is a wasteful number, since it uses less digits than its factorization.

491494629600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5497 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 491494629600 in words is "four hundred ninety-one billion, four hundred ninety-four million, six hundred twenty-nine thousand, six hundred".