61705107840138 has 16 divisors (see below), whose sum is σ = 141040246491840. Its totient is φ = 17630030811456.

The previous prime is 61705107840119. The next prime is 61705107840143. The reversal of 61705107840138 is 83104870150716.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734584617103 + ... + 734584617186.

It is an arithmetic number, because the mean of its divisors is an integer number (8815015405740).

Almost surely, 2^{61705107840138} is an apocalyptic number.

61705107840138 is an abundant number, since it is smaller than the sum of its proper divisors (79335138651702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61705107840138 is a wasteful number, since it uses less digits than its factorization.

61705107840138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469169234301.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 61705107840138 in words is "sixty-one trillion, seven hundred five billion, one hundred seven million, eight hundred forty thousand, one hundred thirty-eight".