78446868001 has 4 divisors (see below), whose sum is σ = 78478772400. Its totient is φ = 78414963604.

The previous prime is 78446867957. The next prime is 78446868011. The reversal of 78446868001 is 10086864487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78446868001 is a prime.

It is a super-2 number, since 2×78446868001² (a number of 23 digits) contains 22 as substring.

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 78446868001.

It is not an unprimeable number, because it can be changed into a prime (78446868011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15948511 + ... + 15953428.

It is an arithmetic number, because the mean of its divisors is an integer number (19619693100).

Almost surely, 2^78446868001 is an apocalyptic number.

It is an amenable number.

78446868001 is a deficient number, since it is larger than the sum of its proper divisors (31904399).

78446868001 is a wasteful number, since it uses less digits than its factorization.

78446868001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31904398.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 78446868001 in words is "seventy-eight billion, four hundred forty-six million, eight hundred sixty-eight thousand, one".