61216325555 has 16 divisors (see below), whose sum is σ = 91585983744. Its totient is φ = 38160826080.

The previous prime is 61216325539. The next prime is 61216325617. The reversal of 61216325555 is 55552361216.

It is not a de Polignac number, because 61216325555 - 2⁴ = 61216325539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79501337 + ... + 79502106.

It is an arithmetic number, because the mean of its divisors is an integer number (5724123984).

Almost surely, 2^61216325555 is an apocalyptic number.

61216325555 is a deficient number, since it is larger than the sum of its proper divisors (30369658189).

61216325555 is a wasteful number, since it uses less digits than its factorization.

61216325555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159003466.

The product of its digits is 270000, while the sum is 41.

The spelling of 61216325555 in words is "sixty-one billion, two hundred sixteen million, three hundred twenty-five thousand, five hundred fifty-five".