7731161536 has 168 divisors, whose sum is σ = 18779597696. Its totient is φ = 3092705280.

The previous prime is 7731161527. The next prime is 7731161551. The reversal of 7731161536 is 6351611377.

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 23 ways as a sum of consecutive naturals, for example, 27318451 + ... + 27318733.

Almost surely, 2^7731161536 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 7731161536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9389798848).

7731161536 is an abundant number, since it is smaller than the sum of its proper divisors (11048436160).

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

7731161536 is a wasteful number, since it uses less digits than its factorization.

7731161536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 520 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 7731161536 is about 87927.0239232513. The cubic root of 7731161536 is about 1977.3410501406.

The spelling of 7731161536 in words is "seven billion, seven hundred thirty-one million, one hundred sixty-one thousand, five hundred thirty-six".