61644127943671 has 32 divisors (see below), whose sum is σ = 80371518671360. Its totient is φ = 45912047965056.

The previous prime is 61644127943663. The next prime is 61644127943683. The reversal of 61644127943671 is 17634972144616.

61644127943671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61644127943671 - 2³ = 61644127943663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61644127943611) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 113273301 + ... + 113816206.

It is an arithmetic number, because the mean of its divisors is an integer number (2511609958480).

Almost surely, 2^{61644127943671} is an apocalyptic number.

61644127943671 is a deficient number, since it is larger than the sum of its proper divisors (18727390727689).

61644127943671 is a wasteful number, since it uses less digits than its factorization.

61644127943671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227089703.

The product of its digits is 36578304, while the sum is 61.

The spelling of 61644127943671 in words is "sixty-one trillion, six hundred forty-four billion, one hundred twenty-seven million, nine hundred forty-three thousand, six hundred seventy-one".