645415010651 has 2 divisors, whose sum is σ = 645415010652. Its totient is φ = 645415010650.

The previous prime is 645415010633. The next prime is 645415010657. The reversal of 645415010651 is 156010514546.

645415010651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645415010651 - 2¹⁴ = 645414994267 is a prime.

It is not a weakly prime, because it can be changed into another prime (645415010657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322707505325 + 322707505326.

It is an arithmetic number, because the mean of its divisors is an integer number (322707505326).

Almost surely, 2^645415010651 is an apocalyptic number.

645415010651 is a deficient number, since it is larger than the sum of its proper divisors (1).

645415010651 is an equidigital number, since it uses as much as digits as its factorization.

645415010651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 645415010651 in words is "six hundred forty-five billion, four hundred fifteen million, ten thousand, six hundred fifty-one".