6525569961 has 9 divisors (see below), whose sum is σ = 9426173341. Its totient is φ = 4350218412.

The previous prime is 6525569927. The next prime is 6525569993. The reversal of 6525569961 is 1699655256.

The square root of 6525569961 is 80781.

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

6525569961 is a `hidden beast` number, since 6 + 525 + 56 + 9 + 9 + 61 = 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 6525569961 - 2¹³ = 6525561769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6525569898 and 6525569907.

It is not an unprimeable number, because it can be changed into a prime (6525569261) 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, 228880 + ... + 255806.

Almost surely, 2^6525569961 is an apocalyptic number.

6525569961 is the 80781-st square number.

6525569961 is the 40391-st centered octagonal number.

It is an amenable number.

6525569961 is a deficient number, since it is larger than the sum of its proper divisors (2900603380).

6525569961 is an frugal number, since it uses more digits than its factorization.

6525569961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53860 (or 26930 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 54.

The cubic root of 6525569961 is about 1868.6995601707.

The spelling of 6525569961 in words is "six billion, five hundred twenty-five million, five hundred sixty-nine thousand, nine hundred sixty-one".