645415010633 has 2 divisors, whose sum is σ = 645415010634. Its totient is φ = 645415010632.

The previous prime is 645415010629. The next prime is 645415010651. The reversal of 645415010633 is 336010514546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612082475449 + 33332535184 = 782357^2 + 182572^2 .

It is a cyclic number.

It is not a de Polignac number, because 645415010633 - 2² = 645415010629 is a prime.

It is a super-4 number, since 4×645415010633⁴ (a number of 48 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (645415010663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322707505316 + 322707505317.

It is an arithmetic number, because the mean of its divisors is an integer number (322707505317).

Almost surely, 2^645415010633 is an apocalyptic number.

It is an amenable number.

645415010633 is a deficient number, since it is larger than the sum of its proper divisors (1).

645415010633 is an equidigital number, since it uses as much as digits as its factorization.

645415010633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 645415010633 in words is "six hundred forty-five billion, four hundred fifteen million, ten thousand, six hundred thirty-three".