671536438487 has 8 divisors (see below), whose sum is σ = 685565143200. Its totient is φ = 657634690720.

The previous prime is 671536438483. The next prime is 671536438493. The reversal of 671536438487 is 784834635176.

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

It is a cyclic number.

It is not a de Polignac number, because 671536438487 - 2² = 671536438483 is a prime.

It is a super-2 number, since 2×671536438487² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671536438483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31728548 + ... + 31749705.

It is an arithmetic number, because the mean of its divisors is an integer number (85695642900).

Almost surely, 2^671536438487 is an apocalyptic number.

671536438487 is a deficient number, since it is larger than the sum of its proper divisors (14028704713).

671536438487 is a wasteful number, since it uses less digits than its factorization.

671536438487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63478473.

The product of its digits is 81285120, while the sum is 62.

The spelling of 671536438487 in words is "six hundred seventy-one billion, five hundred thirty-six million, four hundred thirty-eight thousand, four hundred eighty-seven".