1555320005 has 16 divisors (see below), whose sum is σ = 1930245120. Its totient is φ = 1202353152.

The previous prime is 1555320001. The next prime is 1555320017. The reversal of 1555320005 is 5000235551.

It is a cyclic number.

It is not a de Polignac number, because 1555320005 - 2² = 1555320001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555320001) 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, 23324 + ... + 60453.

It is an arithmetic number, because the mean of its divisors is an integer number (120640320).

Almost surely, 2^1555320005 is an apocalyptic number.

It is an amenable number.

1555320005 is a deficient number, since it is larger than the sum of its proper divisors (374925115).

1555320005 is an equidigital number, since it uses as much as digits as its factorization.

1555320005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83908.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 1555320005 is about 39437.5456259641. The cubic root of 1555320005 is about 1158.6170610570.

Adding to 1555320005 its reverse (5000235551), we get a palindrome (6555555556).

The spelling of 1555320005 in words is "one billion, five hundred fifty-five million, three hundred twenty thousand, five".