61144229485988 has 72 divisors (see below), whose sum is σ = 121466620111872. Its totient is φ = 26883350208000.

The previous prime is 61144229485979. The next prime is 61144229486017. The reversal of 61144229485988 is 88958492244116.

It is a super-2 number, since 2×61144229485988² (a number of 28 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 30244181 + ... + 32202467.

Almost surely, 2^{61144229485988} is an apocalyptic number.

It is an amenable number.

61144229485988 is a deficient number, since it is larger than the sum of its proper divisors (60322390625884).

61144229485988 is a wasteful number, since it uses less digits than its factorization.

61144229485988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960425 (or 1960412 counting only the distinct ones).

The product of its digits is 318504960, while the sum is 71.

The spelling of 61144229485988 in words is "sixty-one trillion, one hundred forty-four billion, two hundred twenty-nine million, four hundred eighty-five thousand, nine hundred eighty-eight".