1555796609 has 16 divisors (see below), whose sum is σ = 1641074688. Its totient is φ = 1473256512.

The previous prime is 1555796603. The next prime is 1555796621. The reversal of 1555796609 is 9066975551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555796609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555796603) 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, 245924 + ... + 252170.

It is an arithmetic number, because the mean of its divisors is an integer number (102567168).

Almost surely, 2^1555796609 is an apocalyptic number.

It is an amenable number.

1555796609 is a deficient number, since it is larger than the sum of its proper divisors (85278079).

1555796609 is a wasteful number, since it uses less digits than its factorization.

1555796609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464.

The product of its (nonzero) digits is 2551500, while the sum is 53.

The square root of 1555796609 is about 39443.5876791146. The cubic root of 1555796609 is about 1158.7353957896.

The spelling of 1555796609 in words is "one billion, five hundred fifty-five million, seven hundred ninety-six thousand, six hundred nine".