67985165391 has 32 divisors (see below), whose sum is σ = 107374444800. Its totient is φ = 38033629920.

The previous prime is 67985165383. The next prime is 67985165393. The reversal of 67985165391 is 19356158976.

It is not a de Polignac number, because 67985165391 - 2³ = 67985165383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67985165393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 602941 + ... + 706758.

It is an arithmetic number, because the mean of its divisors is an integer number (3355451400).

Almost surely, 2^67985165391 is an apocalyptic number.

67985165391 is a deficient number, since it is larger than the sum of its proper divisors (39389279409).

67985165391 is a wasteful number, since it uses less digits than its factorization.

67985165391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309748 (or 1309726 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 60.

The spelling of 67985165391 in words is "sixty-seven billion, nine hundred eighty-five million, one hundred sixty-five thousand, three hundred ninety-one".