61505661050616 has 32 divisors (see below), whose sum is σ = 153765200892240. Its totient is φ = 20501747248128.

The previous prime is 61505661050363. The next prime is 61505661050621. The reversal of 61505661050616 is 61605016650516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5111091 + ... + 12212066.

Almost surely, 2^{61505661050616} is an apocalyptic number.

It is an amenable number.

61505661050616 is an abundant number, since it is smaller than the sum of its proper divisors (92259539841624).

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

61505661050616 is a wasteful number, since it uses less digits than its factorization.

61505661050616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17471103 (or 17471099 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 61505661050616 in words is "sixty-one trillion, five hundred five billion, six hundred sixty-one million, fifty thousand, six hundred sixteen".