1556222545 has 8 divisors (see below), whose sum is σ = 1898081640. Its totient is φ = 1224568320.

The previous prime is 1556222533. The next prime is 1556222561. The reversal of 1556222545 is 5452226551.

It can be written as a sum of positive squares in 4 ways, for example, as 77841 + 1556144704 = 279^2 + 39448^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1556222545 - 2⁵ = 1556222513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550880 + ... + 2551489.

It is an arithmetic number, because the mean of its divisors is an integer number (237260205).

Almost surely, 2^1556222545 is an apocalyptic number.

It is an amenable number.

1556222545 is a deficient number, since it is larger than the sum of its proper divisors (341859095).

1556222545 is an equidigital number, since it uses as much as digits as its factorization.

1556222545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102435.

The product of its digits is 120000, while the sum is 37.

The square root of 1556222545 is about 39448.9866156280. The cubic root of 1556222545 is about 1158.8411298518.

The spelling of 1556222545 in words is "one billion, five hundred fifty-six million, two hundred twenty-two thousand, five hundred forty-five".