61065442477644 has 24 divisors (see below), whose sum is σ = 155439308125248. Its totient is φ = 18504679538640.

The previous prime is 61065442477643. The next prime is 61065442477733. The reversal of 61065442477644 is 44677424456016.

It is not an unprimeable number, because it can be changed into a prime (61065442477643) 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, 231308494102 + ... + 231308494365.

It is an arithmetic number, because the mean of its divisors is an integer number (6476637838552).

Almost surely, 2^{61065442477644} is an apocalyptic number.

It is an amenable number.

61065442477644 is an abundant number, since it is smaller than the sum of its proper divisors (94373865647604).

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

61065442477644 is a wasteful number, since it uses less digits than its factorization.

61065442477644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462616988485 (or 462616988483 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 60.

The spelling of 61065442477644 in words is "sixty-one trillion, sixty-five billion, four hundred forty-two million, four hundred seventy-seven thousand, six hundred forty-four".