61586091655 has 32 divisors (see below), whose sum is σ = 84918297600. Its totient is φ = 42405897600.

The previous prime is 61586091649. The next prime is 61586091659. The reversal of 61586091655 is 55619068516.

It is not a de Polignac number, because 61586091655 - 2⁷ = 61586091527 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61586091659) 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 31 ways as a sum of consecutive naturals, for example, 1726450 + ... + 1761760.

It is an arithmetic number, because the mean of its divisors is an integer number (2653696800).

Almost surely, 2^61586091655 is an apocalyptic number.

61586091655 is a deficient number, since it is larger than the sum of its proper divisors (23332205945).

61586091655 is a wasteful number, since it uses less digits than its factorization.

61586091655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37015.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 61586091655 in words is "sixty-one billion, five hundred eighty-six million, ninety-one thousand, six hundred fifty-five".