4891787145 has 96 divisors (see below), whose sum is σ = 10287793152. Its totient is φ = 2099091456.

The previous prime is 4891787123. The next prime is 4891787149. The reversal of 4891787145 is 5417871984.

4891787145 is a `hidden beast` number, since 489 + 17 + 8 + 7 + 145 = 666.

It is not a de Polignac number, because 4891787145 - 2¹² = 4891783049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4891787091 and 4891787100.

It is not an unprimeable number, because it can be changed into a prime (4891787149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2478379 + ... + 2480351.

It is an arithmetic number, because the mean of its divisors is an integer number (107164512).

Almost surely, 2^4891787145 is an apocalyptic number.

4891787145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4891787145 is an abundant number, since it is smaller than the sum of its proper divisors (5396006007).

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

4891787145 is a wasteful number, since it uses less digits than its factorization.

4891787145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471 (or 2468 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 4891787145 is about 69941.3121481146. The cubic root of 4891787145 is about 1697.5497740847.

The spelling of 4891787145 in words is "four billion, eight hundred ninety-one million, seven hundred eighty-seven thousand, one hundred forty-five".