61617050553861 has 12 divisors (see below), whose sum is σ = 97093534206240. Its totient is φ = 37343667002280.

The previous prime is 61617050553833. The next prime is 61617050553899. The reversal of 61617050553861 is 16835505071616.

61617050553861 is a `hidden beast` number, since 6 + 1 + 6 + 1 + 7 + 0 + 5 + 0 + 553 + 86 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-61617050553861 is a prime.

It is a super-3 number, since 3×61617050553861³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61617050553798 and 61617050553807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61617050553761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311197224921 + ... + 311197225118.

It is an arithmetic number, because the mean of its divisors is an integer number (8091127850520).

Almost surely, 2^{61617050553861} is an apocalyptic number.

It is an amenable number.

61617050553861 is a deficient number, since it is larger than the sum of its proper divisors (35476483652379).

61617050553861 is a wasteful number, since it uses less digits than its factorization.

61617050553861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622394450056 (or 622394450053 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 61617050553861 in words is "sixty-one trillion, six hundred seventeen billion, fifty million, five hundred fifty-three thousand, eight hundred sixty-one".