642914868047 has 2 divisors, whose sum is σ = 642914868048. Its totient is φ = 642914868046.

The previous prime is 642914868031. The next prime is 642914868059. The reversal of 642914868047 is 740868419246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642914868047 - 2⁴ = 642914868031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642914838047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321457434023 + 321457434024.

It is an arithmetic number, because the mean of its divisors is an integer number (321457434024).

Almost surely, 2^642914868047 is an apocalyptic number.

642914868047 is a deficient number, since it is larger than the sum of its proper divisors (1).

642914868047 is an equidigital number, since it uses as much as digits as its factorization.

642914868047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 642914868047 in words is "six hundred forty-two billion, nine hundred fourteen million, eight hundred sixty-eight thousand, forty-seven".