61740911989 has 8 divisors (see below), whose sum is σ = 63412807040. Its totient is φ = 60069186576.

The previous prime is 61740911987. The next prime is 61740912007. The reversal of 61740911989 is 98911904716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61740911989 - 2¹ = 61740911987 is a prime.

It is a super-2 number, since 2×61740911989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61740911987) 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 7 ways as a sum of consecutive naturals, for example, 1122472 + ... + 1176190.

It is an arithmetic number, because the mean of its divisors is an integer number (7926600880).

Almost surely, 2^61740911989 is an apocalyptic number.

It is an amenable number.

61740911989 is a deficient number, since it is larger than the sum of its proper divisors (1671895051).

61740911989 is a wasteful number, since it uses less digits than its factorization.

61740911989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84819.

The product of its (nonzero) digits is 979776, while the sum is 55.

The spelling of 61740911989 in words is "sixty-one billion, seven hundred forty million, nine hundred eleven thousand, nine hundred eighty-nine".