9778997436 has 48 divisors (see below), whose sum is σ = 25237011744. Its totient is φ = 2927598336.

The previous prime is 9778997411. The next prime is 9778997441. The reversal of 9778997436 is 6347998779.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 841335 + ... + 852878.

It is an arithmetic number, because the mean of its divisors is an integer number (525771078).

Almost surely, 2^9778997436 is an apocalyptic number.

It is an amenable number.

9778997436 is an abundant number, since it is smaller than the sum of its proper divisors (15458014308).

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

9778997436 is a wasteful number, since it uses less digits than its factorization.

9778997436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694270 (or 1694268 counting only the distinct ones).

The product of its digits is 144027072, while the sum is 69.

The square root of 9778997436 is about 98888.8135028427. The cubic root of 9778997436 is about 2138.4451275647.

The spelling of 9778997436 in words is "nine billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, four hundred thirty-six".