61684632243 has 32 divisors (see below), whose sum is σ = 104203310400. Its totient is φ = 35726842368.

The previous prime is 61684632221. The next prime is 61684632281. The reversal of 61684632243 is 34223648616.

61684632243 is a `hidden beast` number, since 6 + 1 + 6 + 8 + 4 + 632 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 61684632243 - 2¹⁰ = 61684631219 is a prime.

It is a super-2 number, since 2×61684632243² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61684632283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5162848 + ... + 5174781.

It is an arithmetic number, because the mean of its divisors is an integer number (3256353450).

Almost surely, 2^61684632243 is an apocalyptic number.

61684632243 is a deficient number, since it is larger than the sum of its proper divisors (42518678157).

61684632243 is a wasteful number, since it uses less digits than its factorization.

61684632243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337668 (or 10337662 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The spelling of 61684632243 in words is "sixty-one billion, six hundred eighty-four million, six hundred thirty-two thousand, two hundred forty-three".