645261464603 has 8 divisors (see below), whose sum is σ = 737494464000. Its totient is φ = 553041662760.

The previous prime is 645261464581. The next prime is 645261464621. The reversal of 645261464603 is 306464162546.

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

It is a cyclic number.

It is not a de Polignac number, because 645261464603 - 2⁸ = 645261464347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645261464303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194393 + ... + 3390378.

It is an arithmetic number, because the mean of its divisors is an integer number (92186808000).

Almost surely, 2^645261464603 is an apocalyptic number.

645261464603 is a deficient number, since it is larger than the sum of its proper divisors (92232999397).

645261464603 is a wasteful number, since it uses less digits than its factorization.

645261464603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6598777.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 645261464603 in words is "six hundred forty-five billion, two hundred sixty-one million, four hundred sixty-four thousand, six hundred three".