61005616016556 has 12 divisors (see below), whose sum is σ = 142346437371992. Its totient is φ = 20335205338848.

The previous prime is 61005616016551. The next prime is 61005616016699. The reversal of 61005616016556 is 65561061650016.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×61005616016556² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61005616016551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541900667345 + ... + 2541900667368.

Almost surely, 2^{61005616016556} is an apocalyptic number.

It is an amenable number.

61005616016556 is an abundant number, since it is smaller than the sum of its proper divisors (81340821355436).

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

61005616016556 is a wasteful number, since it uses less digits than its factorization.

61005616016556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083801334720 (or 5083801334718 counting only the distinct ones).

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

The spelling of 61005616016556 in words is "sixty-one trillion, five billion, six hundred sixteen million, sixteen thousand, five hundred fifty-six".