61144376242 has 4 divisors (see below), whose sum is σ = 91716564366. Its totient is φ = 30572188120.

The previous prime is 61144376231. The next prime is 61144376287. The reversal of 61144376242 is 24267344116.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 53684426601 + 7459949641 = 231699^2 + 86371^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 61144376195 and 61144376204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15286094059 + ... + 15286094062.

Almost surely, 2^61144376242 is an apocalyptic number.

61144376242 is a deficient number, since it is larger than the sum of its proper divisors (30572188124).

61144376242 is a wasteful number, since it uses less digits than its factorization.

61144376242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30572188123.

The product of its digits is 193536, while the sum is 40.

The spelling of 61144376242 in words is "sixty-one billion, one hundred forty-four million, three hundred seventy-six thousand, two hundred forty-two".