1858423640042 has 4 divisors (see below), whose sum is σ = 2787635460066. Its totient is φ = 929211820020.

The previous prime is 1858423640027. The next prime is 1858423640057. The reversal of 1858423640042 is 2400463248581.

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

It is an interprime number because it is at equal distance from previous prime (1858423640027) and next prime (1858423640057).

It can be written as a sum of positive squares in only one way, i.e., 1822902322201 + 35521317841 = 1350149^2 + 188471^2 .

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, 464605910009 + ... + 464605910012.

Almost surely, 2^{1858423640042} is an apocalyptic number.

1858423640042 is a deficient number, since it is larger than the sum of its proper divisors (929211820024).

1858423640042 is an equidigital number, since it uses as much as digits as its factorization.

1858423640042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929211820023.

The product of its (nonzero) digits is 1474560, while the sum is 47.

The spelling of 1858423640042 in words is "one trillion, eight hundred fifty-eight billion, four hundred twenty-three million, six hundred forty thousand, forty-two".