61000105555 has 4 divisors (see below), whose sum is σ = 73200126672. Its totient is φ = 48800084440.

The previous prime is 61000105421. The next prime is 61000105577. The reversal of 61000105555 is 55550100016.

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

It is not a de Polignac number, because 61000105555 - 2¹³ = 61000097363 is a prime.

It is a super-2 number, since 2×61000105555² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 6100010551 + ... + 6100010560.

It is an arithmetic number, because the mean of its divisors is an integer number (18300031668).

Almost surely, 2^61000105555 is an apocalyptic number.

61000105555 is a deficient number, since it is larger than the sum of its proper divisors (12200021117).

61000105555 is a wasteful number, since it uses less digits than its factorization.

61000105555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200021116.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 61000105555 in words is "sixty-one billion, one hundred five thousand, five hundred fifty-five".