61609139834 has 16 divisors (see below), whose sum is σ = 100844243136. Its totient is φ = 27996019200.

The previous prime is 61609139789. The next prime is 61609139843. The reversal of 61609139834 is 43893190616.

It is a super-2 number, since 2×61609139834² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328982 + ... + 481089.

It is an arithmetic number, because the mean of its divisors is an integer number (6302765196).

Almost surely, 2^61609139834 is an apocalyptic number.

61609139834 is a deficient number, since it is larger than the sum of its proper divisors (39235103302).

61609139834 is a wasteful number, since it uses less digits than its factorization.

61609139834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813541.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 61609139834 in words is "sixty-one billion, six hundred nine million, one hundred thirty-nine thousand, eight hundred thirty-four".