1491037696 has 40 divisors (see below), whose sum is σ = 2992520520. Its totient is φ = 742176768.

The previous prime is 1491037661. The next prime is 1491037699. The reversal of 1491037696 is 6967301941.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491037699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109810 + ... + 122638.

It is an arithmetic number, because the mean of its divisors is an integer number (74813013).

Almost surely, 2^1491037696 is an apocalyptic number.

1491037696 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 1491037696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496260260).

1491037696 is an abundant number, since it is smaller than the sum of its proper divisors (1501482824).

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

1491037696 is an equidigital number, since it uses as much as digits as its factorization.

1491037696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13074 (or 13058 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1491037696 is about 38613.9572693605. The cubic root of 1491037696 is about 1142.4298474993.

The spelling of 1491037696 in words is "one billion, four hundred ninety-one million, thirty-seven thousand, six hundred ninety-six".