7715712137 has 6 divisors (see below), whose sum is σ = 8975420298. Its totient is φ = 6613467504.

The previous prime is 7715712133. The next prime is 7715712217. The reversal of 7715712137 is 7312175177.

7715712137 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7065411136 + 650301001 = 84056^2 + 25501^2 .

It is not a de Polignac number, because 7715712137 - 2² = 7715712133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7715712094 and 7715712103.

It is not an unprimeable number, because it can be changed into a prime (7715712133) 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 5 ways as a sum of consecutive naturals, for example, 78731708 + ... + 78731805.

It is an arithmetic number, because the mean of its divisors is an integer number (1495903383).

Almost surely, 2^7715712137 is an apocalyptic number.

It is an amenable number.

7715712137 is a deficient number, since it is larger than the sum of its proper divisors (1259708161).

7715712137 is a wasteful number, since it uses less digits than its factorization.

7715712137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157463527 (or 157463520 counting only the distinct ones).

The product of its digits is 72030, while the sum is 41.

The square root of 7715712137 is about 87839.1264585435. The cubic root of 7715712137 is about 1976.0230462797.

The spelling of 7715712137 in words is "seven billion, seven hundred fifteen million, seven hundred twelve thousand, one hundred thirty-seven".