556393745 has 4 divisors (see below), whose sum is σ = 667672500. Its totient is φ = 445114992.

The previous prime is 556393723. The next prime is 556393781. The reversal of 556393745 is 547393655.

It is a Cunningham number, because it is equal to 23588²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200279104 + 356114641 = 14152^2 + 18871^2 .

It is a cyclic number.

It is not a de Polignac number, because 556393745 - 2¹⁸ = 556131601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556393745.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55639370 + ... + 55639379.

It is an arithmetic number, because the mean of its divisors is an integer number (166918125).

Almost surely, 2^556393745 is an apocalyptic number.

It is an amenable number.

556393745 is a deficient number, since it is larger than the sum of its proper divisors (111278755).

556393745 is a wasteful number, since it uses less digits than its factorization.

556393745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111278754.

The product of its digits is 1701000, while the sum is 47.

The square root of 556393745 is about 23588.0000211972. Note that the first 4 decimals coincide. The cubic root of 556393745 is about 822.4839142834.

The spelling of 556393745 in words is "five hundred fifty-six million, three hundred ninety-three thousand, seven hundred forty-five".