64157633 has 2 divisors, whose sum is σ = 64157634. Its totient is φ = 64157632.

The previous prime is 64157617. The next prime is 64157641. The reversal of 64157633 is 33675146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45252529 + 18905104 = 6727^2 + 4348^2 .

It is a cyclic number.

It is not a de Polignac number, because 64157633 - 2⁴ = 64157617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64157593 and 64157602.

It is not a weakly prime, because it can be changed into another prime (64157033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32078816 + 32078817.

It is an arithmetic number, because the mean of its divisors is an integer number (32078817).

Almost surely, 2^64157633 is an apocalyptic number.

It is an amenable number.

64157633 is a deficient number, since it is larger than the sum of its proper divisors (1).

64157633 is an equidigital number, since it uses as much as digits as its factorization.

64157633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 64157633 is about 8009.8460035134. The cubic root of 64157633 is about 400.3281328318.

The spelling of 64157633 in words is "sixty-four million, one hundred fifty-seven thousand, six hundred thirty-three".