61430655861 has 6 divisors (see below), whose sum is σ = 88733169590. Its totient is φ = 40953770568.

The previous prime is 61430655841. The next prime is 61430655883. The reversal of 61430655861 is 16855603416.

61430655861 is a `hidden beast` number, since 6 + 1 + 4 + 3 + 0 + 65 + 586 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44245019025 + 17185636836 = 210345^2 + 131094^2 .

It is not a de Polignac number, because 61430655861 - 2¹¹ = 61430653813 is a prime.

It is a super-2 number, since 2×61430655861² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61430655841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3412814206 + ... + 3412814223.

Almost surely, 2^61430655861 is an apocalyptic number.

It is an amenable number.

61430655861 is a deficient number, since it is larger than the sum of its proper divisors (27302513729).

61430655861 is a wasteful number, since it uses less digits than its factorization.

61430655861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825628435 (or 6825628432 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 61430655861 in words is "sixty-one billion, four hundred thirty million, six hundred fifty-five thousand, eight hundred sixty-one".