61680336812 has 6 divisors (see below), whose sum is σ = 107940589428. Its totient is φ = 30840168404.

The previous prime is 61680336811. The next prime is 61680336859. The reversal of 61680336812 is 21863308616.

It is a super-3 number, since 3×61680336812³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61680336811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710042098 + ... + 7710042105.

It is an arithmetic number, because the mean of its divisors is an integer number (17990098238).

Almost surely, 2^61680336812 is an apocalyptic number.

It is an amenable number.

61680336812 is a deficient number, since it is larger than the sum of its proper divisors (46260252616).

61680336812 is a wasteful number, since it uses less digits than its factorization.

61680336812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15420084207 (or 15420084205 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 61680336812 in words is "sixty-one billion, six hundred eighty million, three hundred thirty-six thousand, eight hundred twelve".