61776271297 has 16 divisors (see below), whose sum is σ = 70897881600. Its totient is φ = 53384392512.

The previous prime is 61776271289. The next prime is 61776271309. The reversal of 61776271297 is 79217267716.

It is not a de Polignac number, because 61776271297 - 2³ = 61776271289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61776271247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2183922 + ... + 2212027.

It is an arithmetic number, because the mean of its divisors is an integer number (4431117600).

Almost surely, 2^61776271297 is an apocalyptic number.

It is an amenable number.

61776271297 is a deficient number, since it is larger than the sum of its proper divisors (9121610303).

61776271297 is a wasteful number, since it uses less digits than its factorization.

61776271297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396032.

The product of its digits is 3111696, while the sum is 55.

The spelling of 61776271297 in words is "sixty-one billion, seven hundred seventy-six million, two hundred seventy-one thousand, two hundred ninety-seven".