641714870557 has 2 divisors, whose sum is σ = 641714870558. Its totient is φ = 641714870556.

The previous prime is 641714870539. The next prime is 641714870561. The reversal of 641714870557 is 755078417146.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359399051001 + 282315819556 = 599499^2 + 531334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641714870557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641714870498 and 641714870507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641714870597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320857435278 + 320857435279.

It is an arithmetic number, because the mean of its divisors is an integer number (320857435279).

Almost surely, 2^641714870557 is an apocalyptic number.

It is an amenable number.

641714870557 is a deficient number, since it is larger than the sum of its proper divisors (1).

641714870557 is an equidigital number, since it uses as much as digits as its factorization.

641714870557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6585600, while the sum is 55.

The spelling of 641714870557 in words is "six hundred forty-one billion, seven hundred fourteen million, eight hundred seventy thousand, five hundred fifty-seven".