671731577426 has 64 divisors (see below), whose sum is σ = 1274280311808. Its totient is φ = 258427127808.

The previous prime is 671731577359. The next prime is 671731577437. The reversal of 671731577426 is 624775137176.

It is a super-2 number, since 2×671731577426² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13868066 + ... + 13916418.

It is an arithmetic number, because the mean of its divisors is an integer number (19910629872).

Almost surely, 2^671731577426 is an apocalyptic number.

671731577426 is a deficient number, since it is larger than the sum of its proper divisors (602548734382).

671731577426 is a wasteful number, since it uses less digits than its factorization.

671731577426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50475.

The product of its digits is 10372320, while the sum is 56.

The spelling of 671731577426 in words is "six hundred seventy-one billion, seven hundred thirty-one million, five hundred seventy-seven thousand, four hundred twenty-six".