61608944678 has 4 divisors (see below), whose sum is σ = 92413417020. Its totient is φ = 30804472338.

The previous prime is 61608944669. The next prime is 61608944689. The reversal of 61608944678 is 87644980616.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15402236168 + ... + 15402236171.

It is an arithmetic number, because the mean of its divisors is an integer number (23103354255).

Almost surely, 2^61608944678 is an apocalyptic number.

61608944678 is a deficient number, since it is larger than the sum of its proper divisors (30804472342).

61608944678 is a wasteful number, since it uses less digits than its factorization.

61608944678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30804472341.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 61608944678 in words is "sixty-one billion, six hundred eight million, nine hundred forty-four thousand, six hundred seventy-eight".