1144997718238 has 32 divisors (see below), whose sum is σ = 1972320618240. Its totient is φ = 493042282560.

The previous prime is 1144997718223. The next prime is 1144997718251. The reversal of 1144997718238 is 8328177994411.

It is a super-2 number, since 2×1144997718238² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1144997718238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19764631 + ... + 19822477.

It is an arithmetic number, because the mean of its divisors is an integer number (61635019320).

Almost surely, 2^{1144997718238} is an apocalyptic number.

1144997718238 is a deficient number, since it is larger than the sum of its proper divisors (827322900002).

1144997718238 is a wasteful number, since it uses less digits than its factorization.

1144997718238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105232.

The product of its digits is 24385536, while the sum is 64.

The spelling of 1144997718238 in words is "one trillion, one hundred forty-four billion, nine hundred ninety-seven million, seven hundred eighteen thousand, two hundred thirty-eight".