61239773078 has 8 divisors (see below), whose sum is σ = 100210537800. Its totient is φ = 27836260480.

The previous prime is 61239773033. The next prime is 61239773083. The reversal of 61239773078 is 87037793216.

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

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 in 3 ways as a sum of consecutive naturals, for example, 1391813003 + ... + 1391813046.

It is an arithmetic number, because the mean of its divisors is an integer number (12526317225).

Almost surely, 2^61239773078 is an apocalyptic number.

61239773078 is a deficient number, since it is larger than the sum of its proper divisors (38970764722).

61239773078 is a wasteful number, since it uses less digits than its factorization.

61239773078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783626062.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 61239773078 in words is "sixty-one billion, two hundred thirty-nine million, seven hundred seventy-three thousand, seventy-eight".