442140125155555 has 4 divisors (see below), whose sum is σ = 530568150186672. Its totient is φ = 353712100124440.

The previous prime is 442140125155549. The next prime is 442140125155567. The reversal of 442140125155555 is 555551521041244.

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

It is not a de Polignac number, because 442140125155555 - 2⁷ = 442140125155427 is a prime.

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 a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442140125155499 and 442140125155508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44214012515551 + ... + 44214012515560.

It is an arithmetic number, because the mean of its divisors is an integer number (132642037546668).

Almost surely, 2^{442140125155555} is an apocalyptic number.

442140125155555 is a deficient number, since it is larger than the sum of its proper divisors (88428025031117).

442140125155555 is an equidigital number, since it uses as much as digits as its factorization.

442140125155555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88428025031116.

The product of its (nonzero) digits is 4000000, while the sum is 49.

Adding to 442140125155555 its reverse (555551521041244), we get a palindrome (997691646196799).

The spelling of 442140125155555 in words is "four hundred forty-two trillion, one hundred forty billion, one hundred twenty-five million, one hundred fifty-five thousand, five hundred fifty-five".