556377945 has 16 divisors (see below), whose sum is σ = 891596160. Its totient is φ = 296271104.

The previous prime is 556377937. The next prime is 556377959. The reversal of 556377945 is 549773655.

It is a cyclic number.

It is not a de Polignac number, because 556377945 - 2³ = 556377937 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18960 + ... + 38369.

It is an arithmetic number, because the mean of its divisors is an integer number (55724760).

Almost surely, 2^556377945 is an apocalyptic number.

It is an amenable number.

556377945 is a deficient number, since it is larger than the sum of its proper divisors (335218215).

556377945 is a wasteful number, since it uses less digits than its factorization.

556377945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57984.

The product of its digits is 3969000, while the sum is 51.

The square root of 556377945 is about 23587.6651027608. The cubic root of 556377945 is about 822.4761288083.

The spelling of 556377945 in words is "five hundred fifty-six million, three hundred seventy-seven thousand, nine hundred forty-five".