1491137559 has 16 divisors (see below), whose sum is σ = 2209993440. Its totient is φ = 993686400.

The previous prime is 1491137551. The next prime is 1491137567. The reversal of 1491137559 is 9557311941.

1491137559 is a `hidden beast` number, since 1 + 4 + 91 + 1 + 3 + 7 + 559 = 666.

It is an interprime number because it is at equal distance from previous prime (1491137551) and next prime (1491137567).

It is not a de Polignac number, because 1491137559 - 2³ = 1491137551 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491137551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65769 + ... + 85485.

It is an arithmetic number, because the mean of its divisors is an integer number (138124590).

Almost surely, 2^1491137559 is an apocalyptic number.

1491137559 is a deficient number, since it is larger than the sum of its proper divisors (718855881).

1491137559 is a wasteful number, since it uses less digits than its factorization.

1491137559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22527 (or 22521 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The square root of 1491137559 is about 38615.2503423194. The cubic root of 1491137559 is about 1142.4553518679.

The spelling of 1491137559 in words is "one billion, four hundred ninety-one million, one hundred thirty-seven thousand, five hundred fifty-nine".