9778836544 has 63 divisors (see below), whose sum is σ = 19902205687. Its totient is φ = 4767192704.

The previous prime is 9778836521. The next prime is 9778836559. The reversal of 9778836544 is 4456388779.

It is a happy number.

The square root of 9778836544 is 98888.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 37181757 + ... + 37182019.

Almost surely, 2^9778836544 is an apocalyptic number.

9778836544 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

9778836544 is the 98888-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9778836544

9778836544 is an abundant number, since it is smaller than the sum of its proper divisors (10123369143).

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

9778836544 is an frugal number, since it uses more digits than its factorization.

9778836544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 312 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 61.

The cubic root of 9778836544 is about 2138.4333996889.

It can be divided in two parts, 97 and 78836544, that added together give a square (78836641 = 8879²).

The spelling of 9778836544 in words is "nine billion, seven hundred seventy-eight million, eight hundred thirty-six thousand, five hundred forty-four".