556940649 has 8 divisors (see below), whose sum is σ = 753671200. Its totient is φ = 365751936.

The previous prime is 556940639. The next prime is 556940717. The reversal of 556940649 is 946049655.

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

It is not a de Polignac number, because 556940649 - 2¹³ = 556932457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556940598 and 556940607.

It is not an unprimeable number, because it can be changed into a prime (556940609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385224 + ... + 1385625.

It is an arithmetic number, because the mean of its divisors is an integer number (94208900).

Almost surely, 2^556940649 is an apocalyptic number.

It is an amenable number.

556940649 is a deficient number, since it is larger than the sum of its proper divisors (196730551).

556940649 is a wasteful number, since it uses less digits than its factorization.

556940649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770919.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 556940649 is about 23599.5900176253. The cubic root of 556940649 is about 822.7533112974.

The spelling of 556940649 in words is "five hundred fifty-six million, nine hundred forty thousand, six hundred forty-nine".