7797485721 has 8 divisors (see below), whose sum is σ = 10397269120. Its totient is φ = 5198013072.

The previous prime is 7797485719. The next prime is 7797485723. The reversal of 7797485721 is 1275847977.

It is an interprime number because it is at equal distance from previous prime (7797485719) and next prime (7797485723).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7797485721 - 2¹ = 7797485719 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7797485723) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10945 + ... + 125358.

It is an arithmetic number, because the mean of its divisors is an integer number (1299658640).

Almost surely, 2^7797485721 is an apocalyptic number.

It is an amenable number.

7797485721 is a deficient number, since it is larger than the sum of its proper divisors (2599783399).

7797485721 is a wasteful number, since it uses less digits than its factorization.

7797485721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155375.

The product of its digits is 6914880, while the sum is 57.

The square root of 7797485721 is about 88303.3732141644. The cubic root of 7797485721 is about 1982.9793700707.

The spelling of 7797485721 in words is "seven billion, seven hundred ninety-seven million, four hundred eighty-five thousand, seven hundred twenty-one".