97727661655 has 32 divisors (see below), whose sum is σ = 128494900800. Its totient is φ = 70911731712.

The previous prime is 97727661653. The next prime is 97727661659. The reversal of 97727661655 is 55616672779.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 97727661655 - 2¹ = 97727661653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97727661593 and 97727661602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97727661653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10691247 + ... + 10700383.

It is an arithmetic number, because the mean of its divisors is an integer number (4015465650).

Almost surely, 2^97727661655 is an apocalyptic number.

97727661655 is a deficient number, since it is larger than the sum of its proper divisors (30767239145).

97727661655 is a wasteful number, since it uses less digits than its factorization.

97727661655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12003.

The product of its digits is 33339600, while the sum is 61.

The spelling of 97727661655 in words is "ninety-seven billion, seven hundred twenty-seven million, six hundred sixty-one thousand, six hundred fifty-five".