1491974443008 has 260 divisors, whose sum is σ = 5093676228960. Its totient is φ = 426277748736.

The previous prime is 1491974442961. The next prime is 1491974443019. The reversal of 1491974443008 is 8003444791941.

1491974443008 is a `hidden beast` number, since 1 + 4 + 9 + 197 + 4 + 443 + 0 + 0 + 8 = 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 19 ways as a sum of consecutive naturals, for example, 2001223 + ... + 2643641.

Almost surely, 2^{1491974443008} is an apocalyptic number.

1491974443008 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 1491974443008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2546838114480).

1491974443008 is an abundant number, since it is smaller than the sum of its proper divisors (3601701785952).

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

1491974443008 is an frugal number, since it uses more digits than its factorization.

1491974443008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642462 (or 642431 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1491974443008 in words is "one trillion, four hundred ninety-one billion, nine hundred seventy-four million, four hundred forty-three thousand, eight".