645363541374 has 16 divisors (see below), whose sum is σ = 1332363440640. Its totient is φ = 208181787480.

The previous prime is 645363541373. The next prime is 645363541387. The reversal of 645363541374 is 473145363546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645363541373) 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 7 ways as a sum of consecutive naturals, for example, 1734848044 + ... + 1734848415.

It is an arithmetic number, because the mean of its divisors is an integer number (83272715040).

Almost surely, 2^645363541374 is an apocalyptic number.

645363541374 is an abundant number, since it is smaller than the sum of its proper divisors (686999899266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645363541374 is a wasteful number, since it uses less digits than its factorization.

645363541374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3469696495.

The product of its digits is 10886400, while the sum is 51.

The spelling of 645363541374 in words is "six hundred forty-five billion, three hundred sixty-three million, five hundred forty-one thousand, three hundred seventy-four".