78298321768 has 16 divisors (see below), whose sum is σ = 147629520000. Its totient is φ = 38930449776.

The previous prime is 78298321723. The next prime is 78298321769. The reversal of 78298321768 is 86712389287.

It is a super-2 number, since 2×78298321768² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78298321769) 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, 27337368 + ... + 27340231.

It is an arithmetic number, because the mean of its divisors is an integer number (9226845000).

Almost surely, 2^78298321768 is an apocalyptic number.

It is an amenable number.

78298321768 is a deficient number, since it is larger than the sum of its proper divisors (69331198232).

78298321768 is a wasteful number, since it uses less digits than its factorization.

78298321768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54677784 (or 54677780 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 61.

The spelling of 78298321768 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred twenty-one thousand, seven hundred sixty-eight".