645555516484 has 24 divisors (see below), whose sum is σ = 1157052733760. Its totient is φ = 314982761184.

The previous prime is 645555516371. The next prime is 645555516503. The reversal of 645555516484 is 484615555546.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1528944 + ... + 1904935.

Almost surely, 2^645555516484 is an apocalyptic number.

It is an amenable number.

645555516484 is a deficient number, since it is larger than the sum of its proper divisors (511497217276).

645555516484 is a wasteful number, since it uses less digits than its factorization.

645555516484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435019 (or 3435017 counting only the distinct ones).

The product of its digits is 57600000, while the sum is 58.

The spelling of 645555516484 in words is "six hundred forty-five billion, five hundred fifty-five million, five hundred sixteen thousand, four hundred eighty-four".