61142666142 has 32 divisors (see below), whose sum is σ = 126518889600. Its totient is φ = 19675482848.

The previous prime is 61142666131. The next prime is 61142666227. The reversal of 61142666142 is 24166624116.

It is a self number, because there is not a number n which added to its sum of digits gives 61142666142.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 1620253 + ... + 1657559.

It is an arithmetic number, because the mean of its divisors is an integer number (3953715300).

Almost surely, 2^61142666142 is an apocalyptic number.

61142666142 is an abundant number, since it is smaller than the sum of its proper divisors (65376223458).

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

61142666142 is a wasteful number, since it uses less digits than its factorization.

61142666142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46760.

The product of its digits is 82944, while the sum is 39.

The spelling of 61142666142 in words is "sixty-one billion, one hundred forty-two million, six hundred sixty-six thousand, one hundred forty-two".