61678730076 has 24 divisors (see below), whose sum is σ = 143936017680. Its totient is φ = 20556865152.

The previous prime is 61678730051. The next prime is 61678730089. The reversal of 61678730076 is 67003787616.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243081 + ... + 427136.

It is an arithmetic number, because the mean of its divisors is an integer number (5997334070).

Almost surely, 2^61678730076 is an apocalyptic number.

It is an amenable number.

61678730076 is an abundant number, since it is smaller than the sum of its proper divisors (82257287604).

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

61678730076 is a wasteful number, since it uses less digits than its factorization.

61678730076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677893 (or 677891 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 51.

The spelling of 61678730076 in words is "sixty-one billion, six hundred seventy-eight million, seven hundred thirty thousand, seventy-six".