7776820044 has 120 divisors (see below), whose sum is σ = 23333291520. Its totient is φ = 2212497504.

The previous prime is 7776820039. The next prime is 7776820049. The reversal of 7776820044 is 4400286777.

It is an interprime number because it is at equal distance from previous prime (7776820039) and next prime (7776820049).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7776820049) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 534879 + ... + 549225.

It is an arithmetic number, because the mean of its divisors is an integer number (194444096).

Almost surely, 2^7776820044 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 7776820044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11666645760).

7776820044 is an abundant number, since it is smaller than the sum of its proper divisors (15556471476).

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

7776820044 is a wasteful number, since it uses less digits than its factorization.

7776820044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14609 (or 14598 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The square root of 7776820044 is about 88186.2803615166. The cubic root of 7776820044 is about 1981.2259900377.

The spelling of 7776820044 in words is "seven billion, seven hundred seventy-six million, eight hundred twenty thousand, forty-four".