1556115413 has 4 divisors (see below), whose sum is σ = 1562315328. Its totient is φ = 1549915500.

The previous prime is 1556115397. The next prime is 1556115443. The reversal of 1556115413 is 3145116551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1556115413 - 2⁴ = 1556115397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1556115413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556115443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099581 + ... + 3100082.

It is an arithmetic number, because the mean of its divisors is an integer number (390578832).

Almost surely, 2^1556115413 is an apocalyptic number.

It is an amenable number.

1556115413 is a deficient number, since it is larger than the sum of its proper divisors (6199915).

1556115413 is an equidigital number, since it uses as much as digits as its factorization.

1556115413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199914.

The product of its digits is 9000, while the sum is 32.

The square root of 1556115413 is about 39447.6287373525. The cubic root of 1556115413 is about 1158.8145372934.

The spelling of 1556115413 in words is "one billion, five hundred fifty-six million, one hundred fifteen thousand, four hundred thirteen".