61656555101 has 8 divisors (see below), whose sum is σ = 64344608064. Its totient is φ = 58969113280.

The previous prime is 61656555083. The next prime is 61656555221. The reversal of 61656555101 is 10155565616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61656555101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61656855101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59690 + ... + 356196.

It is an arithmetic number, because the mean of its divisors is an integer number (8043076008).

Almost surely, 2^61656555101 is an apocalyptic number.

It is an amenable number.

61656555101 is a deficient number, since it is larger than the sum of its proper divisors (2688052963).

61656555101 is a wasteful number, since it uses less digits than its factorization.

61656555101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305571.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 61656555101 in words is "sixty-one billion, six hundred fifty-six million, five hundred fifty-five thousand, one hundred one".