61001100560105 has 4 divisors (see below), whose sum is σ = 73201320672132. Its totient is φ = 48800880448080.

The previous prime is 61001100560089. The next prime is 61001100560111. The reversal of 61001100560105 is 50106500110016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41157318667609 + 19843781892496 = 6415397^2 + 4454636^2 .

It is not a de Polignac number, because 61001100560105 - 2⁴ = 61001100560089 is a prime.

It is a super-2 number, since 2×61001100560105² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6100110056006 + ... + 6100110056015.

It is an arithmetic number, because the mean of its divisors is an integer number (18300330168033).

Almost surely, 2^{61001100560105} is an apocalyptic number.

It is an amenable number.

61001100560105 is a deficient number, since it is larger than the sum of its proper divisors (12200220112027).

61001100560105 is a wasteful number, since it uses less digits than its factorization.

61001100560105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200220112026.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 61001100560105 in words is "sixty-one trillion, one billion, one hundred million, five hundred sixty thousand, one hundred five".