61123344512 has 16 divisors (see below), whose sum is σ = 121769163150. Its totient is φ = 30561672192.

The previous prime is 61123344481. The next prime is 61123344523. The reversal of 61123344512 is 21544332116.

It can be written as a sum of positive squares in only one way, i.e., 35515663936 + 25607680576 = 188456^2 + 160024^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238762937 + ... + 238763192.

Almost surely, 2^61123344512 is an apocalyptic number.

It is an amenable number.

61123344512 is a deficient number, since it is larger than the sum of its proper divisors (60645818638).

61123344512 is an equidigital number, since it uses as much as digits as its factorization.

61123344512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477526143 (or 477526131 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

Adding to 61123344512 its reverse (21544332116), we get a palindrome (82667676628).

The spelling of 61123344512 in words is "sixty-one billion, one hundred twenty-three million, three hundred forty-four thousand, five hundred twelve".