2980936918521 has 9 divisors (see below), whose sum is σ = 4305805252879. Its totient is φ = 1987287825936.

The previous prime is 2980936918451. The next prime is 2980936918523. The reversal of 2980936918521 is 1258196390892.

The square root of 2980936918521 is 1726539.

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

2980936918521 is a `hidden beast` number, since 2 + 9 + 8 + 0 + 93 + 6 + 9 + 18 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 501370205625 + 2479566712896 = 708075^2 + 1574664^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2980936918521 - 2¹¹ = 2980936916473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2980936918523) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4891861 + ... + 5467373.

Almost surely, 2^{2980936918521} is an apocalyptic number.

2980936918521 is the 1726539-th square number.

2980936918521 is the 863270-th centered octagonal number.

It is an amenable number.

2980936918521 is a deficient number, since it is larger than the sum of its proper divisors (1324868334358).

2980936918521 is an frugal number, since it uses more digits than its factorization.

2980936918521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151032 (or 575516 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 2980936918521 in words is "two trillion, nine hundred eighty billion, nine hundred thirty-six million, nine hundred eighteen thousand, five hundred twenty-one".