654487739991 has 12 divisors (see below), whose sum is σ = 1000981249632. Its totient is φ = 410658974016.

The previous prime is 654487739929. The next prime is 654487740001. The reversal of 654487739991 is 199937784456.

654487739991 is a `hidden beast` number, since 6 + 5 + 448 + 7 + 7 + 3 + 99 + 91 = 666.

It is not a de Polignac number, because 654487739991 - 2¹⁴ = 654487723607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654487739911) 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, 2138848671 + ... + 2138848976.

It is an arithmetic number, because the mean of its divisors is an integer number (83415104136).

Almost surely, 2^654487739991 is an apocalyptic number.

654487739991 is a deficient number, since it is larger than the sum of its proper divisors (346493509641).

654487739991 is a wasteful number, since it uses less digits than its factorization.

654487739991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277697670 (or 4277697667 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 72.

The spelling of 654487739991 in words is "six hundred fifty-four billion, four hundred eighty-seven million, seven hundred thirty-nine thousand, nine hundred ninety-one".