163436542021442 has 16 divisors (see below), whose sum is σ = 249246752278392. Its totient is φ = 80355076293120.

The previous prime is 163436542021439. The next prime is 163436542021457. The reversal of 163436542021442 is 244120245634361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 149037241702561 + 14399300318881 = 12208081^2 + 3794641^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195839663 + ... + 196672434.

Almost surely, 2^{163436542021442} is an apocalyptic number.

163436542021442 is a deficient number, since it is larger than the sum of its proper divisors (85810210256950).

163436542021442 is a wasteful number, since it uses less digits than its factorization.

163436542021442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392515573.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 163436542021442 in words is "one hundred sixty-three trillion, four hundred thirty-six billion, five hundred forty-two million, twenty-one thousand, four hundred forty-two".