61115166611 has 4 divisors (see below), whose sum is σ = 63772347792. Its totient is φ = 58457985432.

The previous prime is 61115166557. The next prime is 61115166667. The reversal of 61115166611 is 11666151116.

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 61115166611 - 2¹⁴ = 61115150227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61115166911) 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, 1328590556 + ... + 1328590601.

It is an arithmetic number, because the mean of its divisors is an integer number (15943086948).

Almost surely, 2^61115166611 is an apocalyptic number.

61115166611 is a deficient number, since it is larger than the sum of its proper divisors (2657181181).

61115166611 is a wasteful number, since it uses less digits than its factorization.

61115166611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657181180.

The product of its digits is 6480, while the sum is 35.

The spelling of 61115166611 in words is "sixty-one billion, one hundred fifteen million, one hundred sixty-six thousand, six hundred eleven".