641164693 has 8 divisors (see below), whose sum is σ = 690697728. Its totient is φ = 591662064.

The previous prime is 641164681. The next prime is 641164751. The reversal of 641164693 is 396461146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641164693 is a prime.

It is a super-3 number, since 3×641164693³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641164613) 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, 55896 + ... + 66382.

It is an arithmetic number, because the mean of its divisors is an integer number (86337216).

Almost surely, 2^641164693 is an apocalyptic number.

It is an amenable number.

641164693 is a deficient number, since it is larger than the sum of its proper divisors (49533035).

641164693 is a wasteful number, since it uses less digits than its factorization.

641164693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15203.

The product of its digits is 93312, while the sum is 40.

The square root of 641164693 is about 25321.2300846543. The cubic root of 641164693 is about 862.2963206790.

The spelling of 641164693 in words is "six hundred forty-one million, one hundred sixty-four thousand, six hundred ninety-three".