61917442142 has 16 divisors (see below), whose sum is σ = 95382178560. Its totient is φ = 30130742808.

The previous prime is 61917442129. The next prime is 61917442151. The reversal of 61917442142 is 24124471916.

It is a self number, because there is not a number n which added to its sum of digits gives 61917442142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823108 + ... + 1856759.

It is an arithmetic number, because the mean of its divisors is an integer number (5961386160).

Almost surely, 2^61917442142 is an apocalyptic number.

61917442142 is a deficient number, since it is larger than the sum of its proper divisors (33464736418).

61917442142 is a wasteful number, since it uses less digits than its factorization.

61917442142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680095.

The product of its digits is 96768, while the sum is 41.

The spelling of 61917442142 in words is "sixty-one billion, nine hundred seventeen million, four hundred forty-two thousand, one hundred forty-two".