16181959444 has 48 divisors (see below), whose sum is σ = 34083504000. Its totient is φ = 6566990976.

The previous prime is 16181959411. The next prime is 16181959459. The reversal of 16181959444 is 44495918161.

It is a happy number.

It is a super-2 number, since 2×16181959444² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16181959391 and 16181959400.

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, 1350102 + ... + 1362034.

It is an arithmetic number, because the mean of its divisors is an integer number (710073000).

Almost surely, 2^16181959444 is an apocalyptic number.

16181959444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16181959444 is an abundant number, since it is smaller than the sum of its proper divisors (17901544556).

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

16181959444 is a wasteful number, since it uses less digits than its factorization.

16181959444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14512 (or 14510 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The spelling of 16181959444 in words is "sixteen billion, one hundred eighty-one million, nine hundred fifty-nine thousand, four hundred forty-four".