7825170442 has 4 divisors (see below), whose sum is σ = 11737755666. Its totient is φ = 3912585220.

The previous prime is 7825170439. The next prime is 7825170473. The reversal of 7825170442 is 2440715287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2440715287 = 499 ⋅4891213.

It can be written as a sum of positive squares in only one way, i.e., 7717446801 + 107723641 = 87849^2 + 10379^2 .

It is a super-2 number, since 2×7825170442² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7825170395 and 7825170404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956292609 + ... + 1956292612.

Almost surely, 2^7825170442 is an apocalyptic number.

7825170442 is a deficient number, since it is larger than the sum of its proper divisors (3912585224).

7825170442 is a wasteful number, since it uses less digits than its factorization.

7825170442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912585223.

The product of its (nonzero) digits is 125440, while the sum is 40.

The square root of 7825170442 is about 88459.9934546685. The cubic root of 7825170442 is about 1985.3234328007.

The spelling of 7825170442 in words is "seven billion, eight hundred twenty-five million, one hundred seventy thousand, four hundred forty-two".