671450523405 has 16 divisors (see below), whose sum is σ = 1084176994560. Its totient is φ = 354821560128.

The previous prime is 671450523343. The next prime is 671450523409. The reversal of 671450523405 is 504325054176.

671450523405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671450523405 - 2¹⁵ = 671450490637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671450523409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205334917 + ... + 205338186.

It is an arithmetic number, because the mean of its divisors is an integer number (67761062160).

Almost surely, 2^671450523405 is an apocalyptic number.

It is an amenable number.

671450523405 is a deficient number, since it is larger than the sum of its proper divisors (412726471155).

671450523405 is a wasteful number, since it uses less digits than its factorization.

671450523405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410673220.

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 671450523405 in words is "six hundred seventy-one billion, four hundred fifty million, five hundred twenty-three thousand, four hundred five".