144121867690 has 16 divisors (see below), whose sum is σ = 259426221192. Its totient is φ = 57647222784.

The previous prime is 144121867679. The next prime is 144121867711. The reversal of 144121867690 is 96768121441.

It can be written as a sum of positive squares in 4 ways, for example, as 113780059969 + 30341807721 = 337313^2 + 174189^2 .

It is a super-2 number, since 2×144121867690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256522 + ... + 595018.

Almost surely, 2^144121867690 is an apocalyptic number.

144121867690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144121867690 is a deficient number, since it is larger than the sum of its proper divisors (115304353502).

144121867690 is a wasteful number, since it uses less digits than its factorization.

144121867690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381081.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 144121867690 in words is "one hundred forty-four billion, one hundred twenty-one million, eight hundred sixty-seven thousand, six hundred ninety".