642461031463 has 2 divisors, whose sum is σ = 642461031464. Its totient is φ = 642461031462.

The previous prime is 642461031419. The next prime is 642461031469. The reversal of 642461031463 is 364130164246.

642461031463 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 642461031463 - 2¹³ = 642461023271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642461031469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321230515731 + 321230515732.

It is an arithmetic number, because the mean of its divisors is an integer number (321230515732).

Almost surely, 2^642461031463 is an apocalyptic number.

642461031463 is a deficient number, since it is larger than the sum of its proper divisors (1).

642461031463 is an equidigital number, since it uses as much as digits as its factorization.

642461031463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 642461031463 in words is "six hundred forty-two billion, four hundred sixty-one million, thirty-one thousand, four hundred sixty-three".