61444616613 has 8 divisors (see below), whose sum is σ = 81927300576. Its totient is φ = 40962505200.

The previous prime is 61444616609. The next prime is 61444616627. The reversal of 61444616613 is 31661644416.

61444616613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61444616613 - 2² = 61444616609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61444616663) 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, 349003 + ... + 494663.

It is an arithmetic number, because the mean of its divisors is an integer number (10240912572).

Almost surely, 2^61444616613 is an apocalyptic number.

It is an amenable number.

61444616613 is a deficient number, since it is larger than the sum of its proper divisors (20482683963).

61444616613 is a wasteful number, since it uses less digits than its factorization.

61444616613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286275.

The product of its digits is 248832, while the sum is 42.

The spelling of 61444616613 in words is "sixty-one billion, four hundred forty-four million, six hundred sixteen thousand, six hundred thirteen".