9777461620 has 12 divisors (see below), whose sum is σ = 20532669444. Its totient is φ = 3910984640.

The previous prime is 9777461611. The next prime is 9777461711. The reversal of 9777461620 is 261647779.

It can be written as a sum of positive squares in 2 ways, for example, as 6487980304 + 3289481316 = 80548^2 + 57354^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244436521 + ... + 244436560.

It is an arithmetic number, because the mean of its divisors is an integer number (1711055787).

Almost surely, 2^9777461620 is an apocalyptic number.

It is an amenable number.

9777461620 is an abundant number, since it is smaller than the sum of its proper divisors (10755207824).

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

9777461620 is a wasteful number, since it uses less digits than its factorization.

9777461620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488873090 (or 488873088 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 49.

The square root of 9777461620 is about 98881.0478302086. The cubic root of 9777461620 is about 2138.3331723187. Note that the first 3 decimals are identical.

The spelling of 9777461620 in words is "nine billion, seven hundred seventy-seven million, four hundred sixty-one thousand, six hundred twenty".