7128202137 has 24 divisors (see below), whose sum is σ = 11060280000. Its totient is φ = 4071676896.

The previous prime is 7128202111. The next prime is 7128202139. The reversal of 7128202137 is 7312028217.

It is not a de Polignac number, because 7128202137 - 2⁶ = 7128202073 is a prime.

It is a super-2 number, since 2×7128202137² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7128202098 and 7128202107.

It is not an unprimeable number, because it can be changed into a prime (7128202139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444739 + ... + 460487.

It is an arithmetic number, because the mean of its divisors is an integer number (460845000).

Almost surely, 2^7128202137 is an apocalyptic number.

It is an amenable number.

7128202137 is a deficient number, since it is larger than the sum of its proper divisors (3932077863).

7128202137 is a wasteful number, since it uses less digits than its factorization.

7128202137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18845 (or 18838 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 7128202137 is about 84428.6807725905. The cubic root of 7128202137 is about 1924.5387897831.

The spelling of 7128202137 in words is "seven billion, one hundred twenty-eight million, two hundred two thousand, one hundred thirty-seven".