61142281118 has 4 divisors (see below), whose sum is σ = 91713421680. Its totient is φ = 30571140558.

The previous prime is 61142281111. The next prime is 61142281121. The reversal of 61142281118 is 81118224116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61142281111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15285570278 + ... + 15285570281.

It is an arithmetic number, because the mean of its divisors is an integer number (22928355420).

Almost surely, 2^61142281118 is an apocalyptic number.

61142281118 is a deficient number, since it is larger than the sum of its proper divisors (30571140562).

61142281118 is a wasteful number, since it uses less digits than its factorization.

61142281118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30571140561.

The product of its digits is 6144, while the sum is 35.

The spelling of 61142281118 in words is "sixty-one billion, one hundred forty-two million, two hundred eighty-one thousand, one hundred eighteen".