61785580893 has 4 divisors (see below), whose sum is σ = 82380774528. Its totient is φ = 41190387260.

The previous prime is 61785580841. The next prime is 61785580903. The reversal of 61785580893 is 39808558716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61785580893 - 2²⁵ = 61752026461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61785580093) 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 3 ways as a sum of consecutive naturals, for example, 10297596813 + ... + 10297596818.

It is an arithmetic number, because the mean of its divisors is an integer number (20595193632).

Almost surely, 2^61785580893 is an apocalyptic number.

It is an amenable number.

61785580893 is a deficient number, since it is larger than the sum of its proper divisors (20595193635).

61785580893 is a wasteful number, since it uses less digits than its factorization.

61785580893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20595193634.

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 61785580893 in words is "sixty-one billion, seven hundred eighty-five million, five hundred eighty thousand, eight hundred ninety-three".