78343656080 has 80 divisors (see below), whose sum is σ = 196412428800. Its totient is φ = 28963998720.

The previous prime is 78343656077. The next prime is 78343656119. The reversal of 78343656080 is 8065634387.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×78343656080² (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 15 ways as a sum of consecutive naturals, for example, 566240 + ... + 690879.

It is an arithmetic number, because the mean of its divisors is an integer number (2455155360).

Almost surely, 2^78343656080 is an apocalyptic number.

It is an amenable number.

78343656080 is an abundant number, since it is smaller than the sum of its proper divisors (118068772720).

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

78343656080 is a wasteful number, since it uses less digits than its factorization.

78343656080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257192 (or 1257186 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 78343656080 in words is "seventy-eight billion, three hundred forty-three million, six hundred fifty-six thousand, eighty".