977169813361 has 27 divisors (see below), whose sum is σ = 1143029200761. Its totient is φ = 832941925704.

The previous prime is 977169813353. The next prime is 977169813379. The reversal of 977169813361 is 163318961779.

The square root of 977169813361 is 988519.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 977169813361 - 2³ = 977169813353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 977169813361.

It is not an unprimeable number, because it can be changed into a prime (977169813341) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1958255890 + ... + 1958256388.

It is an arithmetic number, because the mean of its divisors is an integer number (42334414843).

Almost surely, 2^977169813361 is an apocalyptic number.

977169813361 is the 988519-th square number.

977169813361 is the 494260-th centered octagonal number.

It is an amenable number.

977169813361 is a deficient number, since it is larger than the sum of its proper divisors (165859387400).

977169813361 is an frugal number, since it uses more digits than its factorization.

977169813361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 789 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 61.

The spelling of 977169813361 in words is "nine hundred seventy-seven billion, one hundred sixty-nine million, eight hundred thirteen thousand, three hundred sixty-one".