640616333263 has 8 divisors (see below), whose sum is σ = 644322746880. Its totient is φ = 636911337240.

The previous prime is 640616333237. The next prime is 640616333267. The reversal of 640616333263 is 362333616046.

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 640616333263 - 2²¹ = 640614236111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640616333267) 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, 558808 + ... + 1262338.

It is an arithmetic number, because the mean of its divisors is an integer number (80540343360).

Almost surely, 2^640616333263 is an apocalyptic number.

640616333263 is a deficient number, since it is larger than the sum of its proper divisors (3706413617).

640616333263 is a wasteful number, since it uses less digits than its factorization.

640616333263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708797.

The product of its (nonzero) digits is 839808, while the sum is 43.

The spelling of 640616333263 in words is "six hundred forty billion, six hundred sixteen million, three hundred thirty-three thousand, two hundred sixty-three".