7981528471992 has 48 divisors (see below), whose sum is σ = 21634402083840. Its totient is φ = 2658323340288.

The previous prime is 7981528471949. The next prime is 7981528472011. The reversal of 7981528471992 is 2991748251897.

7981528471992 is a `hidden beast` number, since 7 + 9 + 8 + 1 + 528 + 4 + 7 + 1 + 9 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 7981528471992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45456568 + ... + 45631815.

It is an arithmetic number, because the mean of its divisors is an integer number (450716710080).

Almost surely, 2^{7981528471992} is an apocalyptic number.

7981528471992 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7981528471992 is an abundant number, since it is smaller than the sum of its proper divisors (13652873611848).

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

7981528471992 is a wasteful number, since it uses less digits than its factorization.

7981528471992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91089612 (or 91089605 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 72.

The spelling of 7981528471992 in words is "seven trillion, nine hundred eighty-one billion, five hundred twenty-eight million, four hundred seventy-one thousand, nine hundred ninety-two".