61722839445 has 16 divisors (see below), whose sum is σ = 103050306432. Its totient is φ = 31487593280.

The previous prime is 61722839393. The next prime is 61722839459. The reversal of 61722839445 is 54493822716.

It is not a de Polignac number, because 61722839445 - 2¹⁶ = 61722773909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89453046 + ... + 89453735.

It is an arithmetic number, because the mean of its divisors is an integer number (6440644152).

Almost surely, 2^61722839445 is an apocalyptic number.

It is an amenable number.

61722839445 is a deficient number, since it is larger than the sum of its proper divisors (41327466987).

61722839445 is a wasteful number, since it uses less digits than its factorization.

61722839445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178906812.

The product of its digits is 2903040, while the sum is 51.

The spelling of 61722839445 in words is "sixty-one billion, seven hundred twenty-two million, eight hundred thirty-nine thousand, four hundred forty-five".