9942541522042 has 4 divisors (see below), whose sum is σ = 14913812283066. Its totient is φ = 4971270761020.

The previous prime is 9942541522013. The next prime is 9942541522057. The reversal of 9942541522042 is 2402251452499.

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., 7402148634721 + 2540392887321 = 2720689^2 + 1593861^2 .

It is a Smith number, since the sum of its digits (49) 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 polite number, since it can be written as a sum of consecutive naturals, namely, 2485635380509 + ... + 2485635380512.

Almost surely, 2^{9942541522042} is an apocalyptic number.

9942541522042 is a deficient number, since it is larger than the sum of its proper divisors (4971270761024).

9942541522042 is a wasteful number, since it uses less digits than its factorization.

9942541522042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971270761023.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 9942541522042 in words is "nine trillion, nine hundred forty-two billion, five hundred forty-one million, five hundred twenty-two thousand, forty-two".