2656436242 has 4 divisors (see below), whose sum is σ = 3984654366. Its totient is φ = 1328218120.

The previous prime is 2656436239. The next prime is 2656436261. The reversal of 2656436242 is 2426346562.

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

It can be written as a sum of positive squares in only one way, i.e., 2624615361 + 31820881 = 51231^2 + 5641^2 .

It is a super-2 number, since 2×2656436242² = 14113307015622165128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2656436195 and 2656436204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664109059 + ... + 664109062.

Almost surely, 2^2656436242 is an apocalyptic number.

2656436242 is a deficient number, since it is larger than the sum of its proper divisors (1328218124).

2656436242 is a wasteful number, since it uses less digits than its factorization.

2656436242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328218123.

The product of its digits is 414720, while the sum is 40.

The square root of 2656436242 is about 51540.6271013460. The cubic root of 2656436242 is about 1384.9469310254.

The spelling of 2656436242 in words is "two billion, six hundred fifty-six million, four hundred thirty-six thousand, two hundred forty-two".