61101615511655 has 4 divisors (see below), whose sum is σ = 73321938613992. Its totient is φ = 48881292409320.

The previous prime is 61101615511633. The next prime is 61101615511681. The reversal of 61101615511655 is 55611551610116.

61101615511655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61101615511655 - 2³⁰ = 61100541769831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6110161551161 + ... + 6110161551170.

It is an arithmetic number, because the mean of its divisors is an integer number (18330484653498).

Almost surely, 2^{61101615511655} is an apocalyptic number.

61101615511655 is a deficient number, since it is larger than the sum of its proper divisors (12220323102337).

61101615511655 is a wasteful number, since it uses less digits than its factorization.

61101615511655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12220323102336.

The product of its (nonzero) digits is 135000, while the sum is 44.

The spelling of 61101615511655 in words is "sixty-one trillion, one hundred one billion, six hundred fifteen million, five hundred eleven thousand, six hundred fifty-five".