61461661550212 has 144 divisors (see below), whose sum is σ = 137651981644800. Its totient is φ = 23327420921280.

The previous prime is 61461661550207. The next prime is 61461661550239. The reversal of 61461661550212 is 21205516616416.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 215695089 + ... + 215979847.

It is an arithmetic number, because the mean of its divisors is an integer number (955916539200).

Almost surely, 2^{61461661550212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61461661550212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68825990822400).

61461661550212 is an abundant number, since it is smaller than the sum of its proper divisors (76190320094588).

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

61461661550212 is a wasteful number, since it uses less digits than its factorization.

61461661550212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285246 (or 285201 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 61461661550212 in words is "sixty-one trillion, four hundred sixty-one billion, six hundred sixty-one million, five hundred fifty thousand, two hundred twelve".