642462168071 has 2 divisors, whose sum is σ = 642462168072. Its totient is φ = 642462168070.

The previous prime is 642462167983. The next prime is 642462168109. The reversal of 642462168071 is 170861264246.

It is a happy number.

642462168071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642462168071 - 2²² = 642457973767 is a prime.

It is a super-2 number, since 2×642462168071² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642462168371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321231084035 + 321231084036.

It is an arithmetic number, because the mean of its divisors is an integer number (321231084036).

Almost surely, 2^642462168071 is an apocalyptic number.

642462168071 is a deficient number, since it is larger than the sum of its proper divisors (1).

642462168071 is an equidigital number, since it uses as much as digits as its factorization.

642462168071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 642462168071 in words is "six hundred forty-two billion, four hundred sixty-two million, one hundred sixty-eight thousand, seventy-one".