671139535 has 16 divisors (see below), whose sum is σ = 880709760. Its totient is φ = 486919840.

The previous prime is 671139509. The next prime is 671139541. The reversal of 671139535 is 535931176.

It is a happy number.

It is not a de Polignac number, because 671139535 - 2¹⁹ = 670615247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8484 + ... + 37606.

It is an arithmetic number, because the mean of its divisors is an integer number (55044360).

Almost surely, 2^671139535 is an apocalyptic number.

671139535 is a deficient number, since it is larger than the sum of its proper divisors (209570225).

671139535 is a wasteful number, since it uses less digits than its factorization.

671139535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29558.

The product of its digits is 85050, while the sum is 40.

The square root of 671139535 is about 25906.3608984357. The cubic root of 671139535 is about 875.5298168156.

The spelling of 671139535 in words is "six hundred seventy-one million, one hundred thirty-nine thousand, five hundred thirty-five".