61144287377 has 16 divisors (see below), whose sum is σ = 63336136704. Its totient is φ = 58966488000.

The previous prime is 61144287349. The next prime is 61144287389. The reversal of 61144287377 is 77378244116.

It is a cyclic number.

It is not a de Polignac number, because 61144287377 - 2⁶ = 61144287313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61144287307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15411248 + ... + 15415214.

It is an arithmetic number, because the mean of its divisors is an integer number (3958508544).

Almost surely, 2^61144287377 is an apocalyptic number.

It is an amenable number.

61144287377 is a deficient number, since it is larger than the sum of its proper divisors (2191849327).

61144287377 is a wasteful number, since it uses less digits than its factorization.

61144287377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600.

The product of its digits is 1580544, while the sum is 50.

The spelling of 61144287377 in words is "sixty-one billion, one hundred forty-four million, two hundred eighty-seven thousand, three hundred seventy-seven".