61353664866 has 64 divisors (see below), whose sum is σ = 147488087040. Its totient is φ = 18793347840.

The previous prime is 61353664837. The next prime is 61353664871. The reversal of 61353664866 is 66846635316.

61353664866 is a `hidden beast` number, since 6 + 1 + 3 + 536 + 6 + 48 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39415 + ... + 352506.

It is an arithmetic number, because the mean of its divisors is an integer number (2304501360).

Almost surely, 2^61353664866 is an apocalyptic number.

61353664866 is an abundant number, since it is smaller than the sum of its proper divisors (86134422174).

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

61353664866 is a wasteful number, since it uses less digits than its factorization.

61353664866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392168 (or 392162 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 54.

The spelling of 61353664866 in words is "sixty-one billion, three hundred fifty-three million, six hundred sixty-four thousand, eight hundred sixty-six".