641602057 has 2 divisors, whose sum is σ = 641602058. Its totient is φ = 641602056.

The previous prime is 641602033. The next prime is 641602109. The reversal of 641602057 is 750206146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467467641 + 174134416 = 21621^2 + 13196^2 .

It is a cyclic number.

It is not a de Polignac number, because 641602057 - 2⁷ = 641601929 is a prime.

It is not a weakly prime, because it can be changed into another prime (641602007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320801028 + 320801029.

It is an arithmetic number, because the mean of its divisors is an integer number (320801029).

Almost surely, 2^641602057 is an apocalyptic number.

It is an amenable number.

641602057 is a deficient number, since it is larger than the sum of its proper divisors (1).

641602057 is an equidigital number, since it uses as much as digits as its factorization.

641602057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 641602057 is about 25329.8649226560. The cubic root of 641602057 is about 862.4923450136.

The spelling of 641602057 in words is "six hundred forty-one million, six hundred two thousand, fifty-seven".