61516155061643 has 4 divisors (see below), whose sum is σ = 61516245734160. Its totient is φ = 61516064389128.

The previous prime is 61516155061633. The next prime is 61516155061651. The reversal of 61516155061643 is 34616055161516.

61516155061643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61516155061643 - 2⁶ = 61516155061579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61516155061591 and 61516155061600.

It is not an unprimeable number, because it can be changed into a prime (61516155061633) 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 3 ways as a sum of consecutive naturals, for example, 44310863 + ... + 45678056.

It is an arithmetic number, because the mean of its divisors is an integer number (15379061433540).

Almost surely, 2^{61516155061643} is an apocalyptic number.

61516155061643 is a deficient number, since it is larger than the sum of its proper divisors (90672517).

61516155061643 is an equidigital number, since it uses as much as digits as its factorization.

61516155061643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90672516.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 61516155061643 in words is "sixty-one trillion, five hundred sixteen billion, one hundred fifty-five million, sixty-one thousand, six hundred forty-three".