61055556009 has 8 divisors (see below), whose sum is σ = 93037037760. Its totient is φ = 34888889136.

The previous prime is 61055555959. The next prime is 61055556043. The reversal of 61055556009 is 90065555016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61055556009 - 2¹² = 61055551913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61055556059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453703694 + ... + 1453703735.

It is an arithmetic number, because the mean of its divisors is an integer number (11629629720).

Almost surely, 2^61055556009 is an apocalyptic number.

It is an amenable number.

61055556009 is a deficient number, since it is larger than the sum of its proper divisors (31981481751).

61055556009 is a wasteful number, since it uses less digits than its factorization.

61055556009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907407439.

The product of its (nonzero) digits is 202500, while the sum is 42.

The spelling of 61055556009 in words is "sixty-one billion, fifty-five million, five hundred fifty-six thousand, nine".