393791659968 has 112 divisors (see below), whose sum is σ = 1207522404864. Its totient is φ = 110927201280.

The previous prime is 393791659967. The next prime is 393791659993. The reversal of 393791659968 is 869956197393.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×393791659968² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 393791659968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393791659967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1967955 + ... + 2158802.

Almost surely, 2^393791659968 is an apocalyptic number.

It is an amenable number.

393791659968 is an abundant number, since it is smaller than the sum of its proper divisors (813730744896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

393791659968 is a wasteful number, since it uses less digits than its factorization.

393791659968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126850 (or 4126840 counting only the distinct ones).

The product of its digits is 595213920, while the sum is 75.

The spelling of 393791659968 in words is "three hundred ninety-three billion, seven hundred ninety-one million, six hundred fifty-nine thousand, nine hundred sixty-eight".