7891651332 has 108 divisors (see below), whose sum is σ = 20756553636. Its totient is φ = 2527983360.

The previous prime is 7891651291. The next prime is 7891651373. The reversal of 7891651332 is 2331561987.

It is an interprime number because it is at equal distance from previous prime (7891651291) and next prime (7891651373).

It can be written as a sum of positive squares in 6 ways, for example, as 68956416 + 7822694916 = 8304^2 + 88446^2 .

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 in 35 ways as a sum of consecutive naturals, for example, 8385982 + ... + 8386922.

Almost surely, 2^7891651332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7891651332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10378276818).

7891651332 is an abundant number, since it is smaller than the sum of its proper divisors (12864902304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7891651332 is a wasteful number, since it uses less digits than its factorization.

7891651332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1252 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 7891651332 is about 88834.9668317606. The cubic root of 7891651332 is about 1990.9298729118.

The spelling of 7891651332 in words is "seven billion, eight hundred ninety-one million, six hundred fifty-one thousand, three hundred thirty-two".