1491546816 has 168 divisors, whose sum is σ = 4765578480. Its totient is φ = 443252736.

The previous prime is 1491546809. The next prime is 1491546841. The reversal of 1491546816 is 6186451941.

1491546816 is a `hidden beast` number, since 1 + 4 + 91 + 546 + 8 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182040 + ... + 190056.

Almost surely, 2^1491546816 is an apocalyptic number.

1491546816 is a gapful number since it is divisible by the number (16) 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 1491546816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382789240).

1491546816 is an abundant number, since it is smaller than the sum of its proper divisors (3274031664).

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

1491546816 is a wasteful number, since it uses less digits than its factorization.

1491546816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8071 (or 8058 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1491546816 is about 38620.5491416163. The cubic root of 1491546816 is about 1142.5598615823.

The spelling of 1491546816 in words is "one billion, four hundred ninety-one million, five hundred forty-six thousand, eight hundred sixteen".