61605818359541 has 8 divisors (see below), whose sum is σ = 63998154438144. Its totient is φ = 59238798006960.

The previous prime is 61605818359529. The next prime is 61605818359573. The reversal of 61605818359541 is 14595381850616.

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

It is a cyclic number.

It is not a de Polignac number, because 61605818359541 - 2¹⁰ = 61605818358517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61605818350541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6328926545 + ... + 6328936278.

It is an arithmetic number, because the mean of its divisors is an integer number (7999769304768).

Almost surely, 2^{61605818359541} is an apocalyptic number.

It is an amenable number.

61605818359541 is a deficient number, since it is larger than the sum of its proper divisors (2392336078603).

61605818359541 is a wasteful number, since it uses less digits than its factorization.

61605818359541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12657863011.

The product of its (nonzero) digits is 31104000, while the sum is 62.

The spelling of 61605818359541 in words is "sixty-one trillion, six hundred five billion, eight hundred eighteen million, three hundred fifty-nine thousand, five hundred forty-one".