6438154587 has 8 divisors (see below), whose sum is σ = 8587732560. Its totient is φ = 4290339840.

The previous prime is 6438154571. The next prime is 6438154589. The reversal of 6438154587 is 7854518346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6438154587 - 2⁴ = 6438154571 is a prime.

It is a super-2 number, since 2×6438154587² = 82899668972218281138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6438154589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432262 + ... + 446907.

It is an arithmetic number, because the mean of its divisors is an integer number (1073466570).

Almost surely, 2^6438154587 is an apocalyptic number.

6438154587 is a deficient number, since it is larger than the sum of its proper divisors (2149577973).

6438154587 is a wasteful number, since it uses less digits than its factorization.

6438154587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881613.

The product of its digits is 3225600, while the sum is 51.

The square root of 6438154587 is about 80238.1118110340. Note that the first 3 decimals coincide. The cubic root of 6438154587 is about 1860.3177653995.

The spelling of 6438154587 in words is "six billion, four hundred thirty-eight million, one hundred fifty-four thousand, five hundred eighty-seven".