641693045 has 8 divisors (see below), whose sum is σ = 880036224. Its totient is φ = 440018064.

The previous prime is 641693011. The next prime is 641693047. The reversal of 641693045 is 540396146.

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 641693045 - 2⁸ = 641692789 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 (641693047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9167009 + ... + 9167078.

It is an arithmetic number, because the mean of its divisors is an integer number (110004528).

Almost surely, 2^641693045 is an apocalyptic number.

It is an amenable number.

641693045 is a deficient number, since it is larger than the sum of its proper divisors (238343179).

641693045 is a wasteful number, since it uses less digits than its factorization.

641693045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18334099.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 641693045 is about 25331.6609206740. The cubic root of 641693045 is about 862.5331141806.

The spelling of 641693045 in words is "six hundred forty-one million, six hundred ninety-three thousand, forty-five".