61565111160 has 128 divisors (see below), whose sum is σ = 215388288000. Its totient is φ = 14072016000.

The previous prime is 61565111033. The next prime is 61565111161. The reversal of 61565111160 is 6111156516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61565111161) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 706716 + ... + 789035.

It is an arithmetic number, because the mean of its divisors is an integer number (1682721000).

Almost surely, 2^61565111160 is an apocalyptic number.

61565111160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61565111160 is an abundant number, since it is smaller than the sum of its proper divisors (153823176840).

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

61565111160 is a wasteful number, since it uses less digits than its factorization.

61565111160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495786 (or 1495768 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 33.

Adding to 61565111160 its reverse (6111156516), we get a palindrome (67676267676).

The spelling of 61565111160 in words is "sixty-one billion, five hundred sixty-five million, one hundred eleven thousand, one hundred sixty".