61155103617 has 6 divisors (see below), whose sum is σ = 88335149682. Its totient is φ = 40770069072.

The previous prime is 61155103589. The next prime is 61155103631. The reversal of 61155103617 is 71630155116.

61155103617 is a `hidden beast` number, since 61 + 1 + 551 + 0 + 36 + 17 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54850108401 + 6304995216 = 234201^2 + 79404^2 .

It is not a de Polignac number, because 61155103617 - 2³⁵ = 26795365249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61155103417) 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, 3397505748 + ... + 3397505765.

It is an arithmetic number, because the mean of its divisors is an integer number (14722524947).

Almost surely, 2^61155103617 is an apocalyptic number.

It is an amenable number.

61155103617 is a deficient number, since it is larger than the sum of its proper divisors (27180046065).

61155103617 is a wasteful number, since it uses less digits than its factorization.

61155103617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6795011519 (or 6795011516 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The spelling of 61155103617 in words is "sixty-one billion, one hundred fifty-five million, one hundred three thousand, six hundred seventeen".