61089519985 has 32 divisors (see below), whose sum is σ = 79638894720. Its totient is φ = 44717557248.

The previous prime is 61089519983. The next prime is 61089520021. The reversal of 61089519985 is 58991598016.

It is not a de Polignac number, because 61089519985 - 2¹ = 61089519983 is a prime.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61089519983) 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 31 ways as a sum of consecutive naturals, for example, 6576154 + ... + 6585436.

It is an arithmetic number, because the mean of its divisors is an integer number (2488715460).

Almost surely, 2^61089519985 is an apocalyptic number.

61089519985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61089519985 is a deficient number, since it is larger than the sum of its proper divisors (18549374735).

61089519985 is a wasteful number, since it uses less digits than its factorization.

61089519985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177.

The product of its (nonzero) digits is 6998400, while the sum is 61.

The spelling of 61089519985 in words is "sixty-one billion, eighty-nine million, five hundred nineteen thousand, nine hundred eighty-five".