61161130000 has 50 divisors (see below), whose sum is σ = 148077236054. Its totient is φ = 24464448000.

The previous prime is 61161129989. The next prime is 61161130139. The reversal of 61161130000 is 3116116.

It can be written as a sum of positive squares in 5 ways, for example, as 5810098176 + 55351031824 = 76224^2 + 235268^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a self number, because there is not a number n which added to its sum of digits gives 61161130000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3048057 + ... + 3068056.

Almost surely, 2^61161130000 is an apocalyptic number.

It is an amenable number.

61161130000 is an abundant number, since it is smaller than the sum of its proper divisors (86916106054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61161130000 is an equidigital number, since it uses as much as digits as its factorization.

61161130000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6116141 (or 6116120 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 61161130000 its reverse (3116116), we get a palindrome (61164246116).

The spelling of 61161130000 in words is "sixty-one billion, one hundred sixty-one million, one hundred thirty thousand".