645506300654 has 8 divisors (see below), whose sum is σ = 1025215889328. Its totient is φ = 303767670880.

The previous prime is 645506300653. The next prime is 645506300711. The reversal of 645506300654 is 456003605546.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645506300651) 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, 9492739682 + ... + 9492739749.

It is an arithmetic number, because the mean of its divisors is an integer number (128151986166).

Almost surely, 2^645506300654 is an apocalyptic number.

645506300654 is a deficient number, since it is larger than the sum of its proper divisors (379709588674).

645506300654 is a wasteful number, since it uses less digits than its factorization.

645506300654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18985479450.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 645506300654 in words is "six hundred forty-five billion, five hundred six million, three hundred thousand, six hundred fifty-four".