3646145537 has 4 divisors (see below), whose sum is σ = 3672759876. Its totient is φ = 3619531200.

The previous prime is 3646145471. The next prime is 3646145597. The reversal of 3646145537 is 7355416463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7355416463 = 233 ⋅31568311.

It can be written as a sum of positive squares in 2 ways, for example, as 1126005136 + 2520140401 = 33556^2 + 50201^2 .

It is a cyclic number.

It is not a de Polignac number, because 3646145537 - 2¹⁶ = 3646080001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646145597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13306964 + ... + 13307237.

It is an arithmetic number, because the mean of its divisors is an integer number (918189969).

Almost surely, 2^3646145537 is an apocalyptic number.

It is an amenable number.

3646145537 is a deficient number, since it is larger than the sum of its proper divisors (26614339).

3646145537 is a wasteful number, since it uses less digits than its factorization.

3646145537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26614338.

The product of its digits is 907200, while the sum is 44.

The square root of 3646145537 is about 60383.3216790862. The cubic root of 3646145537 is about 1539.1395565807.

The spelling of 3646145537 in words is "three billion, six hundred forty-six million, one hundred forty-five thousand, five hundred thirty-seven".