61980013368 has 144 divisors (see below), whose sum is σ = 210289486680. Its totient is φ = 16346365056.

The previous prime is 61980013357. The next prime is 61980013369. The reversal of 61980013368 is 86331008916.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61980013369) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 629830 + ... + 721557.

Almost surely, 2^61980013368 is an apocalyptic number.

It is an amenable number.

61980013368 is an abundant number, since it is smaller than the sum of its proper divisors (148309473312).

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

61980013368 is a wasteful number, since it uses less digits than its factorization.

61980013368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351426 (or 1351412 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 61980013368 in words is "sixty-one billion, nine hundred eighty million, thirteen thousand, three hundred sixty-eight".