61344653439 has 4 divisors (see below), whose sum is σ = 81792871256. Its totient is φ = 40896435624.

The previous prime is 61344653437. The next prime is 61344653551. The reversal of 61344653439 is 93435644316.

61344653439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61344653439 - 2¹ = 61344653437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61344653431) 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, 10224108904 + ... + 10224108909.

It is an arithmetic number, because the mean of its divisors is an integer number (20448217814).

Almost surely, 2^61344653439 is an apocalyptic number.

61344653439 is a deficient number, since it is larger than the sum of its proper divisors (20448217817).

61344653439 is a wasteful number, since it uses less digits than its factorization.

61344653439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20448217816.

The product of its digits is 2799360, while the sum is 48.

The spelling of 61344653439 in words is "sixty-one billion, three hundred forty-four million, six hundred fifty-three thousand, four hundred thirty-nine".