153774166456642 has 4 divisors (see below), whose sum is σ = 230661249684966. Its totient is φ = 76887083228320.

The previous prime is 153774166456621. The next prime is 153774166456657. The reversal of 153774166456642 is 246654661477351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123547470966481 + 30226695490161 = 11115191^2 + 5497881^2 .

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38443541614159 + ... + 38443541614162.

Almost surely, 2^{153774166456642} is an apocalyptic number.

153774166456642 is a deficient number, since it is larger than the sum of its proper divisors (76887083228324).

153774166456642 is an equidigital number, since it uses as much as digits as its factorization.

153774166456642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76887083228323.

The product of its digits is 609638400, while the sum is 67.

The spelling of 153774166456642 in words is "one hundred fifty-three trillion, seven hundred seventy-four billion, one hundred sixty-six million, four hundred fifty-six thousand, six hundred forty-two".