208161051489 has 12 divisors (see below), whose sum is σ = 300697627776. Its totient is φ = 138764548152.

The previous prime is 208161051481. The next prime is 208161051493. The reversal of 208161051489 is 984150161802.

It is a happy number.

208161051489 is a `hidden beast` number, since 2 + 0 + 8 + 161 + 0 + 5 + 1 + 489 = 666.

It is not a de Polignac number, because 208161051489 - 2³ = 208161051481 is a prime.

It is a super-2 number, since 2×208161051489² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208161051481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 650229 + ... + 916034.

It is an arithmetic number, because the mean of its divisors is an integer number (25058135648).

Almost surely, 2^208161051489 is an apocalyptic number.

It is an amenable number.

208161051489 is a deficient number, since it is larger than the sum of its proper divisors (92536576287).

208161051489 is a wasteful number, since it uses less digits than its factorization.

208161051489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581036 (or 1581033 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 208161051489 in words is "two hundred eight billion, one hundred sixty-one million, fifty-one thousand, four hundred eighty-nine".