30509814497761 has 3 divisors (see below), whose sum is σ = 30509820021331. Its totient is φ = 30509808974192.

The previous prime is 30509814497749. The next prime is 30509814497797. The reversal of 30509814497761 is 16779441890503.

The square root of 30509814497761 is 5523569.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1212709715361 + 29297104782400 = 1101231^2 + 5412680^2 .

It is not a de Polignac number, because 30509814497761 - 2⁹ = 30509814497249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30509814497693 and 30509814497702.

It is not an unprimeable number, because it can be changed into a prime (30509814477761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2761785 + ... + 8285353.

Almost surely, 2^{30509814497761} is an apocalyptic number.

30509814497761 is the 5523569-th square number.

30509814497761 is the 2761785-th centered octagonal number.

It is an amenable number.

30509814497761 is a deficient number, since it is larger than the sum of its proper divisors (5523570).

30509814497761 is an frugal number, since it uses more digits than its factorization.

30509814497761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11047138 (or 5523569 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 30509814497761 in words is "thirty trillion, five hundred nine billion, eight hundred fourteen million, four hundred ninety-seven thousand, seven hundred sixty-one".