7798731552 has 72 divisors (see below), whose sum is σ = 22209854940. Its totient is φ = 2595801600.

The previous prime is 7798731541. The next prime is 7798731553. The reversal of 7798731552 is 2551378977.

It is a happy number.

7798731552 is a `hidden beast` number, since 7 + 7 + 9 + 87 + 3 + 1 + 552 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7709542416 + 89189136 = 87804^2 + 9444^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (7798731553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182574 + ... + 221202.

Almost surely, 2^7798731552 is an apocalyptic number.

7798731552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7798731552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11104927470).

7798731552 is an abundant number, since it is smaller than the sum of its proper divisors (14411123388).

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

7798731552 is a wasteful number, since it uses less digits than its factorization.

7798731552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39346 (or 39335 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 7798731552 is about 88310.4271986044. The cubic root of 7798731552 is about 1983.0849735819.

The spelling of 7798731552 in words is "seven billion, seven hundred ninety-eight million, seven hundred thirty-one thousand, five hundred fifty-two".