61000005605 has 16 divisors (see below), whose sum is σ = 91262346624. Its totient is φ = 38025977280.

The previous prime is 61000005559. The next prime is 61000005607. The reversal of 61000005605 is 50650000016.

It is not a de Polignac number, because 61000005605 - 2¹⁰ = 61000004581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000005607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79220402 + ... + 79221171.

It is an arithmetic number, because the mean of its divisors is an integer number (5703896664).

Almost surely, 2^61000005605 is an apocalyptic number.

It is an amenable number.

61000005605 is a deficient number, since it is larger than the sum of its proper divisors (30262341019).

61000005605 is a wasteful number, since it uses less digits than its factorization.

61000005605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158441596.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 61000005605 in words is "sixty-one billion, five thousand, six hundred five".