78381919796 has 6 divisors (see below), whose sum is σ = 137168359650. Its totient is φ = 39190959896.

The previous prime is 78381919793. The next prime is 78381919801. The reversal of 78381919796 is 69791918387.

It can be written as a sum of positive squares in only one way, i.e., 53008615696 + 25373304100 = 230236^2 + 159290^2 .

It is a super-2 number, since 2×78381919796² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78381919793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9797739971 + ... + 9797739978.

It is an arithmetic number, because the mean of its divisors is an integer number (22861393275).

Almost surely, 2^78381919796 is an apocalyptic number.

It is an amenable number.

78381919796 is a deficient number, since it is larger than the sum of its proper divisors (58786439854).

78381919796 is a wasteful number, since it uses less digits than its factorization.

78381919796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19595479953 (or 19595479951 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 68.

The spelling of 78381919796 in words is "seventy-eight billion, three hundred eighty-one million, nine hundred nineteen thousand, seven hundred ninety-six".