3656712137 has 4 divisors (see below), whose sum is σ = 3937997700. Its totient is φ = 3375426576.

The previous prime is 3656712113. The next prime is 3656712173. The reversal of 3656712137 is 7312176563.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7312176563 = 79 ⋅92559197.

It can be written as a sum of positive squares in 2 ways, for example, as 2145912976 + 1510799161 = 46324^2 + 38869^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656712137 - 2⁸ = 3656711881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3656712094 and 3656712103.

It is not an unprimeable number, because it can be changed into a prime (3656712197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140642762 + ... + 140642787.

It is an arithmetic number, because the mean of its divisors is an integer number (984499425).

Almost surely, 2^3656712137 is an apocalyptic number.

It is an amenable number.

3656712137 is a deficient number, since it is larger than the sum of its proper divisors (281285563).

3656712137 is a wasteful number, since it uses less digits than its factorization.

3656712137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281285562.

The product of its digits is 158760, while the sum is 41.

The square root of 3656712137 is about 60470.7543941697. The cubic root of 3656712137 is about 1540.6249413065.

The spelling of 3656712137 in words is "three billion, six hundred fifty-six million, seven hundred twelve thousand, one hundred thirty-seven".