22161191490 has 64 divisors (see below), whose sum is σ = 59459184000. Its totient is φ = 5873383872.

The previous prime is 22161191489. The next prime is 22161191501. The reversal of 22161191490 is 9419116122.

It is a happy number.

22161191490 is a `hidden beast` number, since 2 + 2 + 161 + 1 + 9 + 1 + 490 = 666.

It is a super-2 number, since 2×22161191490² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207765 + ... + 295784.

It is an arithmetic number, because the mean of its divisors is an integer number (929049750).

Almost surely, 2^22161191490 is an apocalyptic number.

22161191490 is an abundant number, since it is smaller than the sum of its proper divisors (37297992510).

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

22161191490 is a wasteful number, since it uses less digits than its factorization.

22161191490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503728 (or 503722 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 22161191490 in words is "twenty-two billion, one hundred sixty-one million, one hundred ninety-one thousand, four hundred ninety".