61155065611 has 4 divisors (see below), whose sum is σ = 61191104472. Its totient is φ = 61119026752.

The previous prime is 61155065579. The next prime is 61155065689. The reversal of 61155065611 is 11656055116.

61155065611 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 a cyclic number.

It is not a de Polignac number, because 61155065611 - 2⁵ = 61155065579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61155060611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18016885 + ... + 18020278.

It is an arithmetic number, because the mean of its divisors is an integer number (15297776118).

Almost surely, 2^61155065611 is an apocalyptic number.

61155065611 is a deficient number, since it is larger than the sum of its proper divisors (36038861).

61155065611 is a wasteful number, since it uses less digits than its factorization.

61155065611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36038860.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 61155065611 in words is "sixty-one billion, one hundred fifty-five million, sixty-five thousand, six hundred eleven".