61130555123 has 16 divisors (see below), whose sum is σ = 68124036096. Its totient is φ = 54377034240.

The previous prime is 61130555113. The next prime is 61130555149. The reversal of 61130555123 is 32155503116.

It is a cyclic number.

It is not a de Polignac number, because 61130555123 - 2⁴ = 61130555107 is a prime.

It is a super-2 number, since 2×61130555123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61130555123.

It is not an unprimeable number, because it can be changed into a prime (61130555113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2403290 + ... + 2428592.

It is an arithmetic number, because the mean of its divisors is an integer number (4257752256).

Almost surely, 2^61130555123 is an apocalyptic number.

61130555123 is a deficient number, since it is larger than the sum of its proper divisors (6993480973).

61130555123 is a wasteful number, since it uses less digits than its factorization.

61130555123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30034.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 61130555123 in words is "sixty-one billion, one hundred thirty million, five hundred fifty-five thousand, one hundred twenty-three".