642675577241 has 2 divisors, whose sum is σ = 642675577242. Its totient is φ = 642675577240.

The previous prime is 642675577213. The next prime is 642675577253. The reversal of 642675577241 is 142775576246.

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., 500727479641 + 141948097600 = 707621^2 + 376760^2 .

It is a cyclic number.

It is not a de Polignac number, because 642675577241 - 2³⁸ = 367797670297 is a prime.

It is not a weakly prime, because it can be changed into another prime (642675597241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321337788620 + 321337788621.

It is an arithmetic number, because the mean of its divisors is an integer number (321337788621).

Almost surely, 2^642675577241 is an apocalyptic number.

It is an amenable number.

642675577241 is a deficient number, since it is larger than the sum of its proper divisors (1).

642675577241 is an equidigital number, since it uses as much as digits as its factorization.

642675577241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19756800, while the sum is 56.

The spelling of 642675577241 in words is "six hundred forty-two billion, six hundred seventy-five million, five hundred seventy-seven thousand, two hundred forty-one".