61505016412 has 12 divisors (see below), whose sum is σ = 123010032880. Its totient is φ = 26359292736.

The previous prime is 61505016401. The next prime is 61505016439. The reversal of 61505016412 is 21461050516.

61505016412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

61505016412 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098303837 + ... + 1098303892.

Almost surely, 2^61505016412 is an apocalyptic number.

It is an amenable number.

61505016412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61505016412 is a wasteful number, since it uses less digits than its factorization.

61505016412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196607740 (or 2196607738 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 61505016412 its reverse (21461050516), we get a palindrome (82966066928).

The spelling of 61505016412 in words is "sixty-one billion, five hundred five million, sixteen thousand, four hundred twelve".