78380490178 has 8 divisors (see below), whose sum is σ = 118496489472. Its totient is φ = 38881660356.

The previous prime is 78380490163. The next prime is 78380490197. The reversal of 78380490178 is 87109408387.

It is a happy number.

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

It is a super-2 number, since 2×78380490178² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154292050 + ... + 154292557.

It is an arithmetic number, because the mean of its divisors is an integer number (14812061184).

Almost surely, 2^78380490178 is an apocalyptic number.

78380490178 is a deficient number, since it is larger than the sum of its proper divisors (40115999294).

78380490178 is a wasteful number, since it uses less digits than its factorization.

78380490178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308584736.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 78380490178 in words is "seventy-eight billion, three hundred eighty million, four hundred ninety thousand, one hundred seventy-eight".