61271313449 has 32 divisors (see below), whose sum is σ = 66578350080. Its totient is φ = 56201910912.

The previous prime is 61271313443. The next prime is 61271313457. The reversal of 61271313449 is 94431317216.

It is a cyclic number.

It is not a de Polignac number, because 61271313449 - 2¹⁶ = 61271247913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61271313443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59313437 + ... + 59314469.

It is an arithmetic number, because the mean of its divisors is an integer number (2080573440).

Almost surely, 2^61271313449 is an apocalyptic number.

It is an amenable number.

61271313449 is a deficient number, since it is larger than the sum of its proper divisors (5307036631).

61271313449 is a wasteful number, since it uses less digits than its factorization.

61271313449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749.

The product of its digits is 108864, while the sum is 41.

The spelling of 61271313449 in words is "sixty-one billion, two hundred seventy-one million, three hundred thirteen thousand, four hundred forty-nine".