641750617 has 8 divisors (see below), whose sum is σ = 648096840. Its totient is φ = 635416320.

The previous prime is 641750597. The next prime is 641750639. The reversal of 641750617 is 716057146.

It can be written as a sum of positive squares in 4 ways, for example, as 70492816 + 571257801 = 8396^2 + 23901^2 .

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 641750617 - 2⁷ = 641750489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641750687) 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, 136567 + ... + 141187.

It is an arithmetic number, because the mean of its divisors is an integer number (81012105).

Almost surely, 2^641750617 is an apocalyptic number.

It is an amenable number.

641750617 is a deficient number, since it is larger than the sum of its proper divisors (6346223).

641750617 is a wasteful number, since it uses less digits than its factorization.

641750617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 641750617 is about 25332.7972596790. The cubic root of 641750617 is about 862.5589085859.

The spelling of 641750617 in words is "six hundred forty-one million, seven hundred fifty thousand, six hundred seventeen".