7867641601 has 4 divisors (see below), whose sum is σ = 7868492500. Its totient is φ = 7866790704.

The previous prime is 7867641583. The next prime is 7867641641. The reversal of 7867641601 is 1061467687.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6569913025 + 1297728576 = 81055^2 + 36024^2 .

It is a cyclic number.

It is not a de Polignac number, because 7867641601 - 2⁵ = 7867641569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7867641641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411426 + ... + 430123.

It is an arithmetic number, because the mean of its divisors is an integer number (1967123125).

Almost surely, 2^7867641601 is an apocalyptic number.

It is an amenable number.

7867641601 is a deficient number, since it is larger than the sum of its proper divisors (850899).

7867641601 is an equidigital number, since it uses as much as digits as its factorization.

7867641601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850898.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 7867641601 is about 88699.7271754542. The cubic root of 7867641601 is about 1988.9087390826.

The spelling of 7867641601 in words is "seven billion, eight hundred sixty-seven million, six hundred forty-one thousand, six hundred one".