287921683161 has 80 divisors (see below), whose sum is σ = 511899091968. Its totient is φ = 157809254400.

The previous prime is 287921683151. The next prime is 287921683199. The reversal of 287921683161 is 161386129782.

287921683161 is a `hidden beast` number, since 2 + 87 + 92 + 168 + 316 + 1 = 666.

It is not a de Polignac number, because 287921683161 - 2²⁵ = 287888128729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 287921683098 and 287921683107.

It is not an unprimeable number, because it can be changed into a prime (287921683121) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1913721 + ... + 2058681.

Almost surely, 2^287921683161 is an apocalyptic number.

287921683161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

287921683161 is a deficient number, since it is larger than the sum of its proper divisors (223977408807).

287921683161 is a wasteful number, since it uses less digits than its factorization.

287921683161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145124 (or 145115 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 287921683161 in words is "two hundred eighty-seven billion, nine hundred twenty-one million, six hundred eighty-three thousand, one hundred sixty-one".