10438621155 has 48 divisors (see below), whose sum is σ = 18457246080. Its totient is φ = 5456415744.

The previous prime is 10438621111. The next prime is 10438621159. The reversal of 10438621155 is 55112683401.

10438621155 is a `hidden beast` number, since 1 + 0 + 438 + 6 + 211 + 5 + 5 = 666.

It is not a de Polignac number, because 10438621155 - 2¹⁶ = 10438555619 is a prime.

It is a super-2 number, since 2×10438621155² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10438621159) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 476319 + ... + 497751.

It is an arithmetic number, because the mean of its divisors is an integer number (384525960).

Almost surely, 2^10438621155 is an apocalyptic number.

10438621155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10438621155 is a deficient number, since it is larger than the sum of its proper divisors (8018624925).

10438621155 is a wasteful number, since it uses less digits than its factorization.

10438621155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21660 (or 21657 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 10438621155 in words is "ten billion, four hundred thirty-eight million, six hundred twenty-one thousand, one hundred fifty-five".