61543694 has 8 divisors (see below), whose sum is σ = 92684088. Its totient is φ = 30649000.

The previous prime is 61543663. The next prime is 61543709. The reversal of 61543694 is 49634516.

61543694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60797 + ... + 61800.

It is an arithmetic number, because the mean of its divisors is an integer number (11585511).

Almost surely, 2^61543694 is an apocalyptic number.

61543694 is a deficient number, since it is larger than the sum of its proper divisors (31140394).

61543694 is a wasteful number, since it uses less digits than its factorization.

61543694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122850.

The product of its digits is 77760, while the sum is 38.

The square root of 61543694 is about 7844.9789037320. The cubic root of 61543694 is about 394.8157961822.

The spelling of 61543694 in words is "sixty-one million, five hundred forty-three thousand, six hundred ninety-four".