645463741362 has 64 divisors (see below), whose sum is σ = 1444054832640. Its totient is φ = 190636380800.

The previous prime is 645463741361. The next prime is 645463741379. The reversal of 645463741362 is 263147364546.

It is not an unprimeable number, because it can be changed into a prime (645463741361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2640373 + ... + 2874455.

It is an arithmetic number, because the mean of its divisors is an integer number (22563356760).

Almost surely, 2^645463741362 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645463741362, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722027416320).

645463741362 is an abundant number, since it is smaller than the sum of its proper divisors (798591091278).

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

645463741362 is a wasteful number, since it uses less digits than its factorization.

645463741362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235159.

The product of its digits is 8709120, while the sum is 51.

The spelling of 645463741362 in words is "six hundred forty-five billion, four hundred sixty-three million, seven hundred forty-one thousand, three hundred sixty-two".