61142243774 has 4 divisors (see below), whose sum is σ = 91713365664. Its totient is φ = 30571121886.

The previous prime is 61142243753. The next prime is 61142243783. The reversal of 61142243774 is 47734224116.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15285560942 + ... + 15285560945.

It is an arithmetic number, because the mean of its divisors is an integer number (22928341416).

Almost surely, 2^61142243774 is an apocalyptic number.

61142243774 is a deficient number, since it is larger than the sum of its proper divisors (30571121890).

61142243774 is a wasteful number, since it uses less digits than its factorization.

61142243774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30571121889.

The product of its digits is 225792, while the sum is 41.

The spelling of 61142243774 in words is "sixty-one billion, one hundred forty-two million, two hundred forty-three thousand, seven hundred seventy-four".