1491654880800 has 864 divisors, whose sum is σ = 6289078723200. Its totient is φ = 325465620480.

The previous prime is 1491654880787. The next prime is 1491654880817. The reversal of 1491654880800 is 80884561941.

It is a happy number.

1491654880800 is a `hidden beast` number, since 1 + 4 + 9 + 16 + 548 + 8 + 0 + 80 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 130076667 + ... + 130088133.

It is an arithmetic number, because the mean of its divisors is an integer number (7279026300).

Almost surely, 2^{1491654880800} is an apocalyptic number.

1491654880800 is a gapful number since it is divisible by the number (10) 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 1491654880800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3144539361600).

1491654880800 is an abundant number, since it is smaller than the sum of its proper divisors (4797423842400).

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

1491654880800 is a wasteful number, since it uses less digits than its factorization.

1491654880800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11618 (or 11602 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 1491654880800 in words is "one trillion, four hundred ninety-one billion, six hundred fifty-four million, eight hundred eighty thousand, eight hundred".