1556229945 has 16 divisors (see below), whose sum is σ = 2498473152. Its totient is φ = 827154240.

The previous prime is 1556229943. The next prime is 1556229947. The reversal of 1556229945 is 5499226551.

It is an interprime number because it is at equal distance from previous prime (1556229943) and next prime (1556229947).

It is not a de Polignac number, because 1556229945 - 2¹ = 1556229943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556229894 and 1556229903.

It is not an unprimeable number, because it can be changed into a prime (1556229943) 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, 172651 + ... + 181440.

It is an arithmetic number, because the mean of its divisors is an integer number (156154572).

Almost surely, 2^1556229945 is an apocalyptic number.

1556229945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1556229945 is a deficient number, since it is larger than the sum of its proper divisors (942243207).

1556229945 is a wasteful number, since it uses less digits than its factorization.

1556229945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354392.

The product of its digits is 972000, while the sum is 48.

The square root of 1556229945 is about 39449.0804075329. The cubic root of 1556229945 is about 1158.8429666523.

The spelling of 1556229945 in words is "one billion, five hundred fifty-six million, two hundred twenty-nine thousand, nine hundred forty-five".