42194810754647 has 2 divisors, whose sum is σ = 42194810754648. Its totient is φ = 42194810754646.

The previous prime is 42194810754641. The next prime is 42194810754727. The reversal of 42194810754647 is 74645701849124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42194810754647 - 2⁴ = 42194810754631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42194810754647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42194810754641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21097405377323 + 21097405377324.

It is an arithmetic number, because the mean of its divisors is an integer number (21097405377324).

Almost surely, 2^{42194810754647} is an apocalyptic number.

42194810754647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42194810754647 is an equidigital number, since it uses as much as digits as its factorization.

42194810754647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 42194810754647 in words is "forty-two trillion, one hundred ninety-four billion, eight hundred ten million, seven hundred fifty-four thousand, six hundred forty-seven".