30878926448161 has 27 divisors (see below), whose sum is σ = 34142089259187. Its totient is φ = 27906656382000.

The previous prime is 30878926448101. The next prime is 30878926448189. The reversal of 30878926448161 is 16184462987803.

The square root of 30878926448161 is 5556881.

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

It can be written as a sum of positive squares in only one way, i.e., 340261055761 + 30538665392400 = 583319^2 + 5526180^2 .

It is not a de Polignac number, because 30878926448161 - 2²³ = 30878918059553 is a prime.

It is a super-2 number, since 2×30878926448161² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30878926448101) 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, 11063748676 + ... + 11063751466.

Almost surely, 2^{30878926448161} is an apocalyptic number.

30878926448161 is the 5556881-st square number.

30878926448161 is the 2778441-st centered octagonal number.

It is an amenable number.

30878926448161 is a deficient number, since it is larger than the sum of its proper divisors (3263162811026).

30878926448161 is an frugal number, since it uses more digits than its factorization.

30878926448161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966 (or 2983 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 67.

The spelling of 30878926448161 in words is "thirty trillion, eight hundred seventy-eight billion, nine hundred twenty-six million, four hundred forty-eight thousand, one hundred sixty-one".