61161121051 has 16 divisors (see below), whose sum is σ = 65915220096. Its totient is φ = 56540474496.

The previous prime is 61161120961. The next prime is 61161121169. The reversal of 61161121051 is 15012116116.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61161121051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61161121751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317860 + ... + 472606.

It is an arithmetic number, because the mean of its divisors is an integer number (4119701256).

Almost surely, 2^61161121051 is an apocalyptic number.

61161121051 is a deficient number, since it is larger than the sum of its proper divisors (4754099045).

61161121051 is a wasteful number, since it uses less digits than its factorization.

61161121051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155178.

The product of its (nonzero) digits is 360, while the sum is 25.

Adding to 61161121051 its reverse (15012116116), we get a palindrome (76173237167).

The spelling of 61161121051 in words is "sixty-one billion, one hundred sixty-one million, one hundred twenty-one thousand, fifty-one".