645036479 has 4 divisors (see below), whose sum is σ = 645128040. Its totient is φ = 644944920.

The previous prime is 645036467. The next prime is 645036487. The reversal of 645036479 is 974630546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 645036479 - 2⁴ = 645036463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645036079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34244 + ... + 49625.

It is an arithmetic number, because the mean of its divisors is an integer number (161282010).

Almost surely, 2^645036479 is an apocalyptic number.

645036479 is a deficient number, since it is larger than the sum of its proper divisors (91561).

645036479 is an equidigital number, since it uses as much as digits as its factorization.

645036479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91560.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 645036479 is about 25397.5683678576. The cubic root of 645036479 is about 864.0285479929.

The spelling of 645036479 in words is "six hundred forty-five million, thirty-six thousand, four hundred seventy-nine".