1968677657 has 8 divisors (see below), whose sum is σ = 1974093312. Its totient is φ = 1963270800.

The previous prime is 1968677567. The next prime is 1968677671. The reversal of 1968677657 is 7567768691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1968677657 - 2¹⁴ = 1968661273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1968677657.

It is not an unprimeable number, because it can be changed into a prime (1968677677) 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 7 ways as a sum of consecutive naturals, for example, 749807 + ... + 752427.

It is an arithmetic number, because the mean of its divisors is an integer number (246761664).

Almost surely, 2^1968677657 is an apocalyptic number.

It is an amenable number.

1968677657 is a deficient number, since it is larger than the sum of its proper divisors (5415655).

1968677657 is a wasteful number, since it uses less digits than its factorization.

1968677657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399.

The product of its digits is 26671680, while the sum is 62.

The square root of 1968677657 is about 44369.7831525014. The cubic root of 1968677657 is about 1253.3091321452.

The spelling of 1968677657 in words is "one billion, nine hundred sixty-eight million, six hundred seventy-seven thousand, six hundred fifty-seven".