67648657605 has 32 divisors (see below), whose sum is σ = 109044264960. Its totient is φ = 35810875200.

The previous prime is 67648657543. The next prime is 67648657621. The reversal of 67648657605 is 50675684676.

It is not a de Polignac number, because 67648657605 - 2²² = 67644463301 is a prime.

It is a Curzon number.

It is a congruent number.

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, 2894356 + ... + 2917634.

It is an arithmetic number, because the mean of its divisors is an integer number (3407633280).

Almost surely, 2^67648657605 is an apocalyptic number.

It is an amenable number.

67648657605 is a deficient number, since it is larger than the sum of its proper divisors (41395607355).

67648657605 is a wasteful number, since it uses less digits than its factorization.

67648657605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24721.

The product of its (nonzero) digits is 50803200, while the sum is 60.

The spelling of 67648657605 in words is "sixty-seven billion, six hundred forty-eight million, six hundred fifty-seven thousand, six hundred five".