61716520068 has 48 divisors (see below), whose sum is σ = 164855053440. Its totient is φ = 17603541504.

The previous prime is 61716519989. The next prime is 61716520111. The reversal of 61716520068 is 86002561716.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 569683 + ... + 669306.

It is an arithmetic number, because the mean of its divisors is an integer number (3434480280).

Almost surely, 2^61716520068 is an apocalyptic number.

It is an amenable number.

61716520068 is an abundant number, since it is smaller than the sum of its proper divisors (103138533372).

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

61716520068 is a wasteful number, since it uses less digits than its factorization.

61716520068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239596 (or 1239594 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 61716520068 in words is "sixty-one billion, seven hundred sixteen million, five hundred twenty thousand, sixty-eight".