61199895589 has 6 divisors (see below), whose sum is σ = 71191715334. Its totient is φ = 52457053320.

The previous prime is 61199895557. The next prime is 61199895593. The reversal of 61199895589 is 98559899116.

It can be written as a sum of positive squares in only one way, i.e., 43239875364 + 17960020225 = 207942^2 + 134015^2 .

It is not a de Polignac number, because 61199895589 - 2⁵ = 61199895557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61199865589) 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 5 ways as a sum of consecutive naturals, for example, 624488682 + ... + 624488779.

It is an arithmetic number, because the mean of its divisors is an integer number (11865285889).

Almost surely, 2^61199895589 is an apocalyptic number.

It is an amenable number.

61199895589 is a deficient number, since it is larger than the sum of its proper divisors (9991819745).

61199895589 is a wasteful number, since it uses less digits than its factorization.

61199895589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248977475 (or 1248977468 counting only the distinct ones).

The product of its digits is 62985600, while the sum is 70.

The spelling of 61199895589 in words is "sixty-one billion, one hundred ninety-nine million, eight hundred ninety-five thousand, five hundred eighty-nine".