61071706655485 has 4 divisors (see below), whose sum is σ = 73286047986588. Its totient is φ = 48857365324384.

The previous prime is 61071706655471. The next prime is 61071706655503. The reversal of 61071706655485 is 58455660717016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6499180323801 + 54572526331684 = 2549349^2 + 7387322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61071706655485 is a prime.

It is a super-2 number, since 2×61071706655485² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6107170665544 + ... + 6107170665553.

It is an arithmetic number, because the mean of its divisors is an integer number (18321511996647).

Almost surely, 2^{61071706655485} is an apocalyptic number.

It is an amenable number.

61071706655485 is a deficient number, since it is larger than the sum of its proper divisors (12214341331103).

61071706655485 is a wasteful number, since it uses less digits than its factorization.

61071706655485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12214341331102.

The product of its (nonzero) digits is 42336000, while the sum is 61.

The spelling of 61071706655485 in words is "sixty-one trillion, seventy-one billion, seven hundred six million, six hundred fifty-five thousand, four hundred eighty-five".