1556356141 has 4 divisors (see below), whose sum is σ = 1557317884. Its totient is φ = 1555394400.

The previous prime is 1556356129. The next prime is 1556356159. The reversal of 1556356141 is 1416536551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1416536551 = 433 ⋅3271447.

It can be written as a sum of positive squares in 2 ways, for example, as 1143860041 + 412496100 = 33821^2 + 20310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1556356141 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 1556356141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556356181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478440 + ... + 481681.

It is an arithmetic number, because the mean of its divisors is an integer number (389329471).

Almost surely, 2^1556356141 is an apocalyptic number.

It is an amenable number.

1556356141 is a deficient number, since it is larger than the sum of its proper divisors (961743).

1556356141 is an equidigital number, since it uses as much as digits as its factorization.

1556356141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961742.

The product of its digits is 54000, while the sum is 37.

The square root of 1556356141 is about 39450.6798547249. The cubic root of 1556356141 is about 1158.8742896571.

The spelling of 1556356141 in words is "one billion, five hundred fifty-six million, three hundred fifty-six thousand, one hundred forty-one".