7828508161 has 4 divisors (see below), whose sum is σ = 7961194800. Its totient is φ = 7695821524.

The previous prime is 7828508111. The next prime is 7828508167. The reversal of 7828508161 is 1618058287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1618058287 = 773 ⋅2093219.

It is a cyclic number.

It is not a de Polignac number, because 7828508161 - 2⁷ = 7828508033 is a prime.

It is a super-2 number, since 2×7828508161² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7828508167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66343231 + ... + 66343348.

It is an arithmetic number, because the mean of its divisors is an integer number (1990298700).

Almost surely, 2^7828508161 is an apocalyptic number.

It is an amenable number.

7828508161 is a deficient number, since it is larger than the sum of its proper divisors (132686639).

7828508161 is a wasteful number, since it uses less digits than its factorization.

7828508161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132686638.

The product of its (nonzero) digits is 215040, while the sum is 46.

The square root of 7828508161 is about 88478.8571411272. The cubic root of 7828508161 is about 1985.6056634935.

The spelling of 7828508161 in words is "seven billion, eight hundred twenty-eight million, five hundred eight thousand, one hundred sixty-one".