640759323957046 has 16 divisors (see below), whose sum is σ = 1098445845679776. Its totient is φ = 274610816257536.

The previous prime is 640759323957013. The next prime is 640759323957061.

640759323957046 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×640759323957046² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14336121 + ... + 38562196.

It is an arithmetic number, because the mean of its divisors is an integer number (68652865354986).

Almost surely, 2^{640759323957046} is an apocalyptic number.

640759323957046 is a deficient number, since it is larger than the sum of its proper divisors (457686521722730).

640759323957046 is a wasteful number, since it uses less digits than its factorization.

640759323957046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53763543.

The product of its (nonzero) digits is 1028764800, while the sum is 70.

The spelling of 640759323957046 in words is "six hundred forty trillion, seven hundred fifty-nine billion, three hundred twenty-three million, nine hundred fifty-seven thousand, forty-six".