1491623227008 has 640 divisors, whose sum is σ = 4805648971200. Its totient is φ = 457751347200.

The previous prime is 1491623227001. The next prime is 1491623227019. The reversal of 1491623227008 is 8007223261941.

1491623227008 is a `hidden beast` number, since 1 + 491 + 62 + 32 + 2 + 70 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1491623227001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2481901908 + ... + 2481902508.

Almost surely, 2^{1491623227008} is an apocalyptic number.

1491623227008 is a gapful number since it is divisible by the number (18) 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 1491623227008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2402824485600).

1491623227008 is an abundant number, since it is smaller than the sum of its proper divisors (3314025744192).

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

1491623227008 is a wasteful number, since it uses less digits than its factorization.

1491623227008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

Adding to 1491623227008 its reverse (8007223261941), we get a palindrome (9498846488949).

The spelling of 1491623227008 in words is "one trillion, four hundred ninety-one billion, six hundred twenty-three million, two hundred twenty-seven thousand, eight".