642919527611 has 2 divisors, whose sum is σ = 642919527612. Its totient is φ = 642919527610.

The previous prime is 642919527479. The next prime is 642919527617. The reversal of 642919527611 is 116725919246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642919527611 is a prime.

It is not a weakly prime, because it can be changed into another prime (642919527617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321459763805 + 321459763806.

It is an arithmetic number, because the mean of its divisors is an integer number (321459763806).

Almost surely, 2^642919527611 is an apocalyptic number.

642919527611 is a deficient number, since it is larger than the sum of its proper divisors (1).

642919527611 is an equidigital number, since it uses as much as digits as its factorization.

642919527611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The spelling of 642919527611 in words is "six hundred forty-two billion, nine hundred nineteen million, five hundred twenty-seven thousand, six hundred eleven".