61697808642 has 8 divisors (see below), whose sum is σ = 123395617296. Its totient is φ = 20565936212.

The previous prime is 61697808631. The next prime is 61697808643. The reversal of 61697808642 is 24680879616.

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

61697808642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (61697808643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5141484048 + ... + 5141484059.

It is an arithmetic number, because the mean of its divisors is an integer number (15424452162).

Almost surely, 2^61697808642 is an apocalyptic number.

61697808642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61697808642 is a wasteful number, since it uses less digits than its factorization.

61697808642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282968112.

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 61697808642 in words is "sixty-one billion, six hundred ninety-seven million, eight hundred eight thousand, six hundred forty-two".