1491912864 has 192 divisors, whose sum is σ = 4796668800. Its totient is φ = 448229376.

The previous prime is 1491912839. The next prime is 1491912893. The reversal of 1491912864 is 4682191941.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 481432 + ... + 484520.

It is an arithmetic number, because the mean of its divisors is an integer number (24982650).

Almost surely, 2^1491912864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491912864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2398334400).

1491912864 is an abundant number, since it is smaller than the sum of its proper divisors (3304755936).

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

1491912864 is a wasteful number, since it uses less digits than its factorization.

1491912864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164 (or 3150 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1491912864 is about 38625.2878824223. The cubic root of 1491912864 is about 1142.6533210565.

The spelling of 1491912864 in words is "one billion, four hundred ninety-one million, nine hundred twelve thousand, eight hundred sixty-four".