163436666206442 has 8 divisors (see below), whose sum is σ = 245155085851716. Its totient is φ = 81718304255872.

The previous prime is 163436666206423. The next prime is 163436666206481. The reversal of 163436666206442 is 244602666634361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 90170958313921 + 73265707892521 = 9495839^2 + 8559539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462983 + ... + 19200090.

Almost surely, 2^{163436666206442} is an apocalyptic number.

163436666206442 is a deficient number, since it is larger than the sum of its proper divisors (81718419645274).

163436666206442 is a wasteful number, since it uses less digits than its factorization.

163436666206442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28847352.

The product of its (nonzero) digits is 107495424, while the sum is 59.

The spelling of 163436666206442 in words is "one hundred sixty-three trillion, four hundred thirty-six billion, six hundred sixty-six million, two hundred six thousand, four hundred forty-two".