641701057 has 4 divisors (see below), whose sum is σ = 679448196. Its totient is φ = 603953920.

The previous prime is 641701031. The next prime is 641701061. The reversal of 641701057 is 750107146.

641701057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750107146 = 2 ⋅375053573.

It can be written as a sum of positive squares in 2 ways, for example, as 417630096 + 224070961 = 20436^2 + 14969^2 .

It is a cyclic number.

It is not a de Polignac number, because 641701057 - 2²⁷ = 507483329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641701087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18873544 + ... + 18873577.

It is an arithmetic number, because the mean of its divisors is an integer number (169862049).

Almost surely, 2^641701057 is an apocalyptic number.

It is an amenable number.

641701057 is a deficient number, since it is larger than the sum of its proper divisors (37747139).

641701057 is a wasteful number, since it uses less digits than its factorization.

641701057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37747138.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 641701057 is about 25331.8190621992. The cubic root of 641701057 is about 862.5367039481.

The spelling of 641701057 in words is "six hundred forty-one million, seven hundred one thousand, fifty-seven".