4645640437 has 2 divisors, whose sum is σ = 4645640438. Its totient is φ = 4645640436.

The previous prime is 4645640369. The next prime is 4645640459. The reversal of 4645640437 is 7340465464.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3715024401 + 930616036 = 60951^2 + 30506^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645640437 - 2¹⁵ = 4645607669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4645640393 and 4645640402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645640537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322820218 + 2322820219.

It is an arithmetic number, because the mean of its divisors is an integer number (2322820219).

Almost surely, 2^4645640437 is an apocalyptic number.

It is an amenable number.

4645640437 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645640437 is an equidigital number, since it uses as much as digits as its factorization.

4645640437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 43.

The square root of 4645640437 is about 68158.9351222567. The cubic root of 4645640437 is about 1668.5857529676.

The spelling of 4645640437 in words is "four billion, six hundred forty-five million, six hundred forty thousand, four hundred thirty-seven".