61605813209578 has 8 divisors (see below), whose sum is σ = 100809512524800. Its totient is φ = 28002642367980.

The previous prime is 61605813209557. The next prime is 61605813209581. The reversal of 61605813209578 is 87590231850616.

61605813209578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400132118378 + ... + 1400132118421.

It is an arithmetic number, because the mean of its divisors is an integer number (12601189065600).

Almost surely, 2^{61605813209578} is an apocalyptic number.

61605813209578 is a deficient number, since it is larger than the sum of its proper divisors (39203699315222).

61605813209578 is a wasteful number, since it uses less digits than its factorization.

61605813209578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800264236812.

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 61605813209578 in words is "sixty-one trillion, six hundred five billion, eight hundred thirteen million, two hundred nine thousand, five hundred seventy-eight".