7128642737 has 4 divisors (see below), whose sum is σ = 7503834480. Its totient is φ = 6753450996.

The previous prime is 7128642713. The next prime is 7128642739. The reversal of 7128642737 is 7372468217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7128642737 - 2¹² = 7128638641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7128642691 and 7128642700.

It is not an unprimeable number, because it can be changed into a prime (7128642739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187595843 + ... + 187595880.

It is an arithmetic number, because the mean of its divisors is an integer number (1875958620).

Almost surely, 2^7128642737 is an apocalyptic number.

It is an amenable number.

7128642737 is a deficient number, since it is larger than the sum of its proper divisors (375191743).

7128642737 is a wasteful number, since it uses less digits than its factorization.

7128642737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375191742.

The product of its digits is 790272, while the sum is 47.

The square root of 7128642737 is about 84431.2900351523. The cubic root of 7128642737 is about 1924.5784414046.

The spelling of 7128642737 in words is "seven billion, one hundred twenty-eight million, six hundred forty-two thousand, seven hundred thirty-seven".