11438073855 has 64 divisors (see below), whose sum is σ = 22176000000. Its totient is φ = 5559705216.

The previous prime is 11438073821. The next prime is 11438073859. The reversal of 11438073855 is 55837083411.

It is a happy number.

It is not a de Polignac number, because 11438073855 - 2⁶ = 11438073791 is a prime.

It is a super-2 number, since 2×11438073855² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11438073855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11438073859) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97396 + ... + 179894.

It is an arithmetic number, because the mean of its divisors is an integer number (346500000).

Almost surely, 2^11438073855 is an apocalyptic number.

11438073855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11438073855 is a deficient number, since it is larger than the sum of its proper divisors (10737926145).

11438073855 is a wasteful number, since it uses less digits than its factorization.

11438073855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82605 (or 82599 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 11438073855 in words is "eleven billion, four hundred thirty-eight million, seventy-three thousand, eight hundred fifty-five".