7658991840 has 192 divisors, whose sum is σ = 24745222656. Its totient is φ = 1990490112.

The previous prime is 7658991829. The next prime is 7658991859. The reversal of 7658991840 is 481998567.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 4145797 + ... + 4147643.

It is an arithmetic number, because the mean of its divisors is an integer number (128881368).

Almost surely, 2^7658991840 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 7658991840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12372611328).

7658991840 is an abundant number, since it is smaller than the sum of its proper divisors (17086230816).

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

7658991840 is a wasteful number, since it uses less digits than its factorization.

7658991840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2073 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The square root of 7658991840 is about 87515.6662546769. Note that the first 3 decimals coincide. The cubic root of 7658991840 is about 1971.1690382384.

The spelling of 7658991840 in words is "seven billion, six hundred fifty-eight million, nine hundred ninety-one thousand, eight hundred forty".