1491619560 has 128 divisors (see below), whose sum is σ = 4675829760. Its totient is φ = 380217600.

The previous prime is 1491619531. The next prime is 1491619601. The reversal of 1491619560 is 659161941.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306345 + ... + 311175.

It is an arithmetic number, because the mean of its divisors is an integer number (36529920).

Almost surely, 2^1491619560 is an apocalyptic number.

1491619560 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 1491619560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2337914880).

1491619560 is an abundant number, since it is smaller than the sum of its proper divisors (3184210200).

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

1491619560 is a wasteful number, since it uses less digits than its factorization.

1491619560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959 (or 4955 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1491619560 is about 38621.4909085602. The cubic root of 1491619560 is about 1142.5784358174.

The spelling of 1491619560 in words is "one billion, four hundred ninety-one million, six hundred nineteen thousand, five hundred sixty".