671040512531 has 4 divisors (see below), whose sum is σ = 682414080600. Its totient is φ = 659666944464.

The previous prime is 671040512507. The next prime is 671040512539. The reversal of 671040512531 is 135215040176.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671040512531 - 2³⁴ = 653860643347 is a prime.

It is a super-2 number, since 2×671040512531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671040512491 and 671040512500.

It is not an unprimeable number, because it can be changed into a prime (671040512539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5686783946 + ... + 5686784063.

It is an arithmetic number, because the mean of its divisors is an integer number (170603520150).

Almost surely, 2^671040512531 is an apocalyptic number.

671040512531 is a deficient number, since it is larger than the sum of its proper divisors (11373568069).

671040512531 is a wasteful number, since it uses less digits than its factorization.

671040512531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11373568068.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 671040512531 in words is "six hundred seventy-one billion, forty million, five hundred twelve thousand, five hundred thirty-one".