61100110561 has 8 divisors (see below), whose sum is σ = 69833953280. Its totient is φ = 52367581728.

The previous prime is 61100110501. The next prime is 61100110609. The reversal of 61100110561 is 16501100116.

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

It is not a de Polignac number, because 61100110561 - 2¹³ = 61100102369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61100110501) 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, 226716 + ... + 416653.

It is an arithmetic number, because the mean of its divisors is an integer number (8729244160).

Almost surely, 2^61100110561 is an apocalyptic number.

It is an amenable number.

61100110561 is a deficient number, since it is larger than the sum of its proper divisors (8733842719).

61100110561 is a wasteful number, since it uses less digits than its factorization.

61100110561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656943.

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 61100110561 its reverse (16501100116), we get a palindrome (77601210677).

The spelling of 61100110561 in words is "sixty-one billion, one hundred million, one hundred ten thousand, five hundred sixty-one".