61106005505 has 4 divisors (see below), whose sum is σ = 73327206612. Its totient is φ = 48884804400.

The previous prime is 61106005489. The next prime is 61106005559. The reversal of 61106005505 is 50550060116.

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 43316848129 + 17789157376 = 208127^2 + 133376^2 .

It is not a de Polignac number, because 61106005505 - 2⁴ = 61106005489 is a prime.

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, 6110600546 + ... + 6110600555.

It is an arithmetic number, because the mean of its divisors is an integer number (18331801653).

Almost surely, 2^61106005505 is an apocalyptic number.

It is an amenable number.

61106005505 is a deficient number, since it is larger than the sum of its proper divisors (12221201107).

61106005505 is a wasteful number, since it uses less digits than its factorization.

61106005505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12221201106.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 61106005505 in words is "sixty-one billion, one hundred six million, five thousand, five hundred five".