7991215092 has 288 divisors, whose sum is σ = 26568622080. Its totient is φ = 1969505280.

The previous prime is 7991215081. The next prime is 7991215097. The reversal of 7991215092 is 2905121997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991215097) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2521693 + ... + 2524859.

It is an arithmetic number, because the mean of its divisors is an integer number (92252160).

Almost surely, 2^7991215092 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 7991215092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13284311040).

7991215092 is an abundant number, since it is smaller than the sum of its proper divisors (18577406988).

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

7991215092 is a wasteful number, since it uses less digits than its factorization.

7991215092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251 (or 3246 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 7991215092 is about 89393.5964820747. The cubic root of 7991215092 is about 1999.2676562023.

The spelling of 7991215092 in words is "seven billion, nine hundred ninety-one million, two hundred fifteen thousand, ninety-two".