556243132642 has 4 divisors (see below), whose sum is σ = 834364698966. Its totient is φ = 278121566320.

The previous prime is 556243132639. The next prime is 556243132747. The reversal of 556243132642 is 246231342655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246231342655 = 5 ⋅49246268531.

It can be written as a sum of positive squares in only one way, i.e., 295621651521 + 260621481121 = 543711^2 + 510511^2 .

It is a super-2 number, since 2×556243132642² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139060783159 + ... + 139060783162.

Almost surely, 2^556243132642 is an apocalyptic number.

556243132642 is a deficient number, since it is larger than the sum of its proper divisors (278121566324).

556243132642 is a wasteful number, since it uses less digits than its factorization.

556243132642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278121566323.

The product of its digits is 1036800, while the sum is 43.

The spelling of 556243132642 in words is "five hundred fifty-six billion, two hundred forty-three million, one hundred thirty-two thousand, six hundred forty-two".