61956122285 has 4 divisors (see below), whose sum is σ = 74347346748. Its totient is φ = 49564897824.

The previous prime is 61956122273. The next prime is 61956122323. The reversal of 61956122285 is 58222165916.

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 8885324644 + 53070797641 = 94262^2 + 230371^2 .

It is a cyclic number.

It is not a de Polignac number, because 61956122285 - 2¹⁰ = 61956121261 is a prime.

It is a super-2 number, since 2×61956122285² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6195612224 + ... + 6195612233.

It is an arithmetic number, because the mean of its divisors is an integer number (18586836687).

Almost surely, 2^61956122285 is an apocalyptic number.

It is an amenable number.

61956122285 is a deficient number, since it is larger than the sum of its proper divisors (12391224463).

61956122285 is a wasteful number, since it uses less digits than its factorization.

61956122285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12391224462.

The product of its digits is 518400, while the sum is 47.

The spelling of 61956122285 in words is "sixty-one billion, nine hundred fifty-six million, one hundred twenty-two thousand, two hundred eighty-five".