7251691888 has 120 divisors (see below), whose sum is σ = 16722322560. Its totient is φ = 3036620160.

The previous prime is 7251691883. The next prime is 7251691903. The reversal of 7251691888 is 8881961527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7251691883) 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 23 ways as a sum of consecutive naturals, for example, 9759645 + ... + 9760387.

It is an arithmetic number, because the mean of its divisors is an integer number (139352688).

Almost surely, 2^7251691888 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 7251691888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8361161280).

7251691888 is an abundant number, since it is smaller than the sum of its proper divisors (9470630672).

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

7251691888 is a wasteful number, since it uses less digits than its factorization.

7251691888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035 (or 1022 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 55.

The square root of 7251691888 is about 85156.8663585034. The cubic root of 7251691888 is about 1935.5888623912.

The spelling of 7251691888 in words is "seven billion, two hundred fifty-one million, six hundred ninety-one thousand, eight hundred eighty-eight".