61005537742 has 4 divisors (see below), whose sum is σ = 91508306616. Its totient is φ = 30502768870.

The previous prime is 61005537739. The next prime is 61005537743. The reversal of 61005537742 is 24773550016.

61005537742 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 junction number, because it is equal to n+sod(n) for n = 61005537695 and 61005537704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005537743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15251384434 + ... + 15251384437.

It is an arithmetic number, because the mean of its divisors is an integer number (22877076654).

Almost surely, 2^61005537742 is an apocalyptic number.

61005537742 is a deficient number, since it is larger than the sum of its proper divisors (30502768874).

61005537742 is a wasteful number, since it uses less digits than its factorization.

61005537742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30502768873.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 61005537742 in words is "sixty-one billion, five million, five hundred thirty-seven thousand, seven hundred forty-two".