61168275561 has 8 divisors (see below), whose sum is σ = 81574220160. Its totient is φ = 40770590672.

The previous prime is 61168275541. The next prime is 61168275587. The reversal of 61168275561 is 16557286116.

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

It is a cyclic number.

It is not a de Polignac number, because 61168275561 - 2⁵ = 61168275529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61168275561.

It is not an unprimeable number, because it can be changed into a prime (61168275521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047626 + ... + 2077283.

It is an arithmetic number, because the mean of its divisors is an integer number (10196777520).

Almost surely, 2^61168275561 is an apocalyptic number.

It is an amenable number.

61168275561 is a deficient number, since it is larger than the sum of its proper divisors (20405944599).

61168275561 is a wasteful number, since it uses less digits than its factorization.

61168275561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129855.

The product of its digits is 604800, while the sum is 48.

The spelling of 61168275561 in words is "sixty-one billion, one hundred sixty-eight million, two hundred seventy-five thousand, five hundred sixty-one".