61688000438 has 8 divisors (see below), whose sum is σ = 95516904000. Its totient is φ = 29849032440.

The previous prime is 61688000431. The next prime is 61688000447. The reversal of 61688000438 is 83400088616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61688000431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497483813 + ... + 497483936.

It is an arithmetic number, because the mean of its divisors is an integer number (11939613000).

Almost surely, 2^61688000438 is an apocalyptic number.

61688000438 is a deficient number, since it is larger than the sum of its proper divisors (33828903562).

61688000438 is a wasteful number, since it uses less digits than its factorization.

61688000438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994967782.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 61688000438 in words is "sixty-one billion, six hundred eighty-eight million, four hundred thirty-eight", and thus it is an aban number.