1115801217438 has 32 divisors (see below), whose sum is σ = 2266390550400. Its totient is φ = 366142978080.

The previous prime is 1115801217437. The next prime is 1115801217449. The reversal of 1115801217438 is 8347121085111.

It is a happy number.

It is a super-2 number, since 2×1115801217438² (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 1115801217438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115801217431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291013 + ... + 1521936.

It is an arithmetic number, because the mean of its divisors is an integer number (70824704700).

Almost surely, 2^{1115801217438} is an apocalyptic number.

1115801217438 is an abundant number, since it is smaller than the sum of its proper divisors (1150589332962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115801217438 is a wasteful number, since it uses less digits than its factorization.

1115801217438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814552.

The product of its (nonzero) digits is 53760, while the sum is 42.

The spelling of 1115801217438 in words is "one trillion, one hundred fifteen billion, eight hundred one million, two hundred seventeen thousand, four hundred thirty-eight".