641764423207 has 16 divisors (see below), whose sum is σ = 687918827520. Its totient is φ = 597138344352.

The previous prime is 641764423199. The next prime is 641764423217. The reversal of 641764423207 is 702324467146.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 641764423207 - 2³ = 641764423199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641764423217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3866508 + ... + 4029070.

It is an arithmetic number, because the mean of its divisors is an integer number (42994926720).

Almost surely, 2^641764423207 is an apocalyptic number.

641764423207 is a deficient number, since it is larger than the sum of its proper divisors (46154404313).

641764423207 is a wasteful number, since it uses less digits than its factorization.

641764423207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167262.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 641764423207 in words is "six hundred forty-one billion, seven hundred sixty-four million, four hundred twenty-three thousand, two hundred seven".