2447913705561 has 9 divisors (see below), whose sum is σ = 3535882132341. Its totient is φ = 1631939341212.

The previous prime is 2447913705547. The next prime is 2447913705577. The reversal of 2447913705561 is 1655073197442.

The square root of 2447913705561 is 1564581.

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

2447913705561 is a `hidden beast` number, since 2 + 4 + 4 + 7 + 9 + 1 + 3 + 70 + 5 + 561 = 666.

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

It is not a de Polignac number, because 2447913705561 - 2¹⁷ = 2447913574489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2447913705498 and 2447913705507.

It is not an unprimeable number, because it can be changed into a prime (2447913705961) 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, 4432980 + ... + 4954506.

Almost surely, 2^{2447913705561} is an apocalyptic number.

2447913705561 is the 1564581-st square number.

2447913705561 is the 782291-st centered octagonal number.

It is an amenable number.

2447913705561 is a deficient number, since it is larger than the sum of its proper divisors (1087968426780).

2447913705561 is an frugal number, since it uses more digits than its factorization.

2447913705561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043060 (or 521530 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 2447913705561 in words is "two trillion, four hundred forty-seven billion, nine hundred thirteen million, seven hundred five thousand, five hundred sixty-one".