78081568 has 12 divisors (see below), whose sum is σ = 153723150. Its totient is φ = 39040768.

The previous prime is 78081559. The next prime is 78081587. The reversal of 78081568 is 86518087.

It can be written as a sum of positive squares in only one way, i.e., 53993104 + 24088464 = 7348^2 + 4908^2 .

It is a super-2 number, since 2×78081568² = 12193462522677248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219993 + ... + 1220056.

Almost surely, 2^78081568 is an apocalyptic number.

It is an amenable number.

78081568 is a deficient number, since it is larger than the sum of its proper divisors (75641582).

78081568 is a wasteful number, since it uses less digits than its factorization.

78081568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440059 (or 2440051 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 78081568 is about 8836.3775383355. The cubic root of 78081568 is about 427.4147531309.

The spelling of 78081568 in words is "seventy-eight million, eighty-one thousand, five hundred sixty-eight".