645015467 has 2 divisors, whose sum is σ = 645015468. Its totient is φ = 645015466.

The previous prime is 645015431. The next prime is 645015491. The reversal of 645015467 is 764510546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645015467 - 2¹⁴ = 644999083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645015467.

It is not a weakly prime, because it can be changed into another prime (645015167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322507733 + 322507734.

It is an arithmetic number, because the mean of its divisors is an integer number (322507734).

Almost surely, 2^645015467 is an apocalyptic number.

645015467 is a deficient number, since it is larger than the sum of its proper divisors (1).

645015467 is an equidigital number, since it uses as much as digits as its factorization.

645015467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 645015467 is about 25397.1547028402. The cubic root of 645015467 is about 864.0191660093.

The spelling of 645015467 in words is "six hundred forty-five million, fifteen thousand, four hundred sixty-seven".