9777609378 has 24 divisors (see below), whose sum is σ = 21186692748. Its totient is φ = 3258915072.

The previous prime is 9777609377. The next prime is 9777609397. The reversal of 9777609378 is 8739067779.

It can be written as a sum of positive squares in 2 ways, for example, as 9326344329 + 451265049 = 96573^2 + 21243^2 .

It is not an unprimeable number, because it can be changed into a prime (9777609371) 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, 313750 + ... + 343502.

Almost surely, 2^9777609378 is an apocalyptic number.

9777609378 is an abundant number, since it is smaller than the sum of its proper divisors (11409083370).

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

9777609378 is a wasteful number, since it uses less digits than its factorization.

9777609378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48018 (or 48015 counting only the distinct ones).

The product of its (nonzero) digits is 28005264, while the sum is 63.

The square root of 9777609378 is about 98881.7949776398. The cubic root of 9777609378 is about 2138.3439438343.

The spelling of 9777609378 in words is "nine billion, seven hundred seventy-seven million, six hundred nine thousand, three hundred seventy-eight".