61773942678 has 64 divisors (see below), whose sum is σ = 149537000448. Its totient is φ = 16607738880.

The previous prime is 61773942673. The next prime is 61773942683. The reversal of 61773942678 is 87624937716.

It is an interprime number because it is at equal distance from previous prime (61773942673) and next prime (61773942683).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61773942673) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 4878151 + ... + 4890797.

It is an arithmetic number, because the mean of its divisors is an integer number (2336515632).

Almost surely, 2^61773942678 is an apocalyptic number.

61773942678 is an abundant number, since it is smaller than the sum of its proper divisors (87763057770).

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

61773942678 is a wasteful number, since it uses less digits than its factorization.

61773942678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19517.

The product of its digits is 21337344, while the sum is 60.

The spelling of 61773942678 in words is "sixty-one billion, seven hundred seventy-three million, nine hundred forty-two thousand, six hundred seventy-eight".