6561246654 has 24 divisors (see below), whose sum is σ = 14218080552. Its totient is φ = 2186767440.

The previous prime is 6561246641. The next prime is 6561246691. The reversal of 6561246654 is 4566421656.

6561246654 is a `hidden beast` number, since 6 + 561 + 24 + 6 + 65 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126264 + ... + 170484.

It is an arithmetic number, because the mean of its divisors is an integer number (592420023).

Almost surely, 2^6561246654 is an apocalyptic number.

6561246654 is an abundant number, since it is smaller than the sum of its proper divisors (7656833898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6561246654 is a wasteful number, since it uses less digits than its factorization.

6561246654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52472 (or 52469 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 6561246654 is about 81001.5225412461. The cubic root of 6561246654 is about 1872.0989000319.

The spelling of 6561246654 in words is "six billion, five hundred sixty-one million, two hundred forty-six thousand, six hundred fifty-four".