61338367613 has 4 divisors (see below), whose sum is σ = 61341539580. Its totient is φ = 61335195648.

The previous prime is 61338367609. The next prime is 61338367619. The reversal of 61338367613 is 31676383316.

61338367613 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 can be written as a sum of positive squares in 2 ways, for example, as 43441814329 + 17896553284 = 208427^2 + 133778^2 .

It is a cyclic number.

It is not a de Polignac number, because 61338367613 - 2² = 61338367609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61338367619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556798 + ... + 1595711.

It is an arithmetic number, because the mean of its divisors is an integer number (15335384895).

Almost surely, 2^61338367613 is an apocalyptic number.

It is an amenable number.

61338367613 is a deficient number, since it is larger than the sum of its proper divisors (3171967).

61338367613 is a wasteful number, since it uses less digits than its factorization.

61338367613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171966.

The product of its digits is 979776, while the sum is 47.

The spelling of 61338367613 in words is "sixty-one billion, three hundred thirty-eight million, three hundred sixty-seven thousand, six hundred thirteen".