640335061362 has 32 divisors (see below), whose sum is σ = 1283479247232. Its totient is φ = 212977315584.

The previous prime is 640335061361. The next prime is 640335061369. The reversal of 640335061362 is 263160533046.

It is a self number, because there is not a number n which added to its sum of digits gives 640335061362.

It is not an unprimeable number, because it can be changed into a prime (640335061361) 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 15 ways as a sum of consecutive naturals, for example, 5336458 + ... + 5455130.

It is an arithmetic number, because the mean of its divisors is an integer number (40108726476).

Almost surely, 2^640335061362 is an apocalyptic number.

640335061362 is an abundant number, since it is smaller than the sum of its proper divisors (643144185870).

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

640335061362 is a wasteful number, since it uses less digits than its factorization.

640335061362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120642.

The product of its (nonzero) digits is 233280, while the sum is 39.

The spelling of 640335061362 in words is "six hundred forty billion, three hundred thirty-five million, sixty-one thousand, three hundred sixty-two".