61343788105 has 8 divisors (see below), whose sum is σ = 74081416392. Its totient is φ = 48762450048.

The previous prime is 61343788081. The next prime is 61343788147. The reversal of 61343788105 is 50188734316.

It can be written as a sum of positive squares in 4 ways, for example, as 2368521 + 61341419584 = 1539^2 + 247672^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61343788105 is a prime.

It is a super-2 number, since 2×61343788105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39071692 + ... + 39073261.

It is an arithmetic number, because the mean of its divisors is an integer number (9260177049).

Almost surely, 2^61343788105 is an apocalyptic number.

It is an amenable number.

61343788105 is a deficient number, since it is larger than the sum of its proper divisors (12737628287).

61343788105 is a wasteful number, since it uses less digits than its factorization.

61343788105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78145115.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 61343788105 in words is "sixty-one billion, three hundred forty-three million, seven hundred eighty-eight thousand, one hundred five".