61105505610561 has 8 divisors (see below), whose sum is σ = 81477316437120. Its totient is φ = 40735349262192.

The previous prime is 61105505610467. The next prime is 61105505610631. The reversal of 61105505610561 is 16501650550116.

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

It is not a de Polignac number, because 61105505610561 - 2¹⁰ = 61105505609537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61105505610361) 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, 413533366 + ... + 413681103.

It is an arithmetic number, because the mean of its divisors is an integer number (10184664554640).

Almost surely, 2^{61105505610561} is an apocalyptic number.

It is an amenable number.

61105505610561 is a deficient number, since it is larger than the sum of its proper divisors (20371810826559).

61105505610561 is a wasteful number, since it uses less digits than its factorization.

61105505610561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827239095.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 61105505610561 in words is "sixty-one trillion, one hundred five billion, five hundred five million, six hundred ten thousand, five hundred sixty-one".