1005198166442 has 4 divisors (see below), whose sum is σ = 1507797249666. Its totient is φ = 502599083220.

The previous prime is 1005198166411. The next prime is 1005198166447. The reversal of 1005198166442 is 2446618915001.

1005198166442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 923595959521 + 81602206921 = 961039^2 + 285661^2 .

It is not an unprimeable number, because it can be changed into a prime (1005198166447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251299541609 + ... + 251299541612.

Almost surely, 2^{1005198166442} is an apocalyptic number.

1005198166442 is a deficient number, since it is larger than the sum of its proper divisors (502599083224).

1005198166442 is an equidigital number, since it uses as much as digits as its factorization.

1005198166442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502599083223.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 1005198166442 in words is "one trillion, five billion, one hundred ninety-eight million, one hundred sixty-six thousand, four hundred forty-two".