645342435054634 has 8 divisors (see below), whose sum is σ = 971694312858720. Its totient is φ = 321444330768396.

The previous prime is 645342435054631. The next prime is 645342435054671. The reversal of 645342435054634 is 436450534243546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (645342435054631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613443378804 + ... + 613443379855.

It is an arithmetic number, because the mean of its divisors is an integer number (121461789107340).

Almost surely, 2^{645342435054634} is an apocalyptic number.

645342435054634 is a deficient number, since it is larger than the sum of its proper divisors (326351877804086).

645342435054634 is a wasteful number, since it uses less digits than its factorization.

645342435054634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226886758924.

The product of its (nonzero) digits is 248832000, while the sum is 58.

The spelling of 645342435054634 in words is "six hundred forty-five trillion, three hundred forty-two billion, four hundred thirty-five million, fifty-four thousand, six hundred thirty-four".