9978775622 has 4 divisors (see below), whose sum is σ = 14968163436. Its totient is φ = 4989387810.

The previous prime is 9978775601. The next prime is 9978775627. The reversal of 9978775622 is 2265778799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2265778799 = 2423 ⋅935113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978775627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494693904 + ... + 2494693907.

It is an arithmetic number, because the mean of its divisors is an integer number (3742040859).

Almost surely, 2^9978775622 is an apocalyptic number.

9978775622 is a deficient number, since it is larger than the sum of its proper divisors (4989387814).

9978775622 is a wasteful number, since it uses less digits than its factorization.

9978775622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989387813.

The product of its digits is 26671680, while the sum is 62.

The square root of 9978775622 is about 99893.8217408865. The cubic root of 9978775622 is about 2152.9093925314.

The spelling of 9978775622 in words is "nine billion, nine hundred seventy-eight million, seven hundred seventy-five thousand, six hundred twenty-two".