640763367046 has 16 divisors (see below), whose sum is σ = 1074095579088. Its totient is φ = 284152268800.

The previous prime is 640763367031. The next prime is 640763367071.

640763367046 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×640763367046³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 640763366984 and 640763367002.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 355189435 + ... + 355191238.

It is an arithmetic number, because the mean of its divisors is an integer number (67130973693).

Almost surely, 2^640763367046 is an apocalyptic number.

640763367046 is a deficient number, since it is larger than the sum of its proper divisors (433332212042).

640763367046 is a wasteful number, since it uses less digits than its factorization.

640763367046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710380727.

The product of its (nonzero) digits is 9144576, while the sum is 52.

The spelling of 640763367046 in words is "six hundred forty billion, seven hundred sixty-three million, three hundred sixty-seven thousand, forty-six".