2756728642 has 4 divisors (see below), whose sum is σ = 4135092966. Its totient is φ = 1378364320.

The previous prime is 2756728613. The next prime is 2756728657. The reversal of 2756728642 is 2468276572.

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., 1705607401 + 1051121241 = 41299^2 + 32421^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689182159 + ... + 689182162.

Almost surely, 2^2756728642 is an apocalyptic number.

2756728642 is a deficient number, since it is larger than the sum of its proper divisors (1378364324).

2756728642 is a wasteful number, since it uses less digits than its factorization.

2756728642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378364323.

The product of its digits is 2257920, while the sum is 49.

The square root of 2756728642 is about 52504.5582973517. The cubic root of 2756728642 is about 1402.1613964350.

The spelling of 2756728642 in words is "two billion, seven hundred fifty-six million, seven hundred twenty-eight thousand, six hundred forty-two".