78171056 has 10 divisors (see below), whose sum is σ = 151456452. Its totient is φ = 39085520.

The previous prime is 78171031. The next prime is 78171091. The reversal of 78171056 is 65017187.

It is a super-2 number, since 2×78171056² = 12221427992310272, 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, 2442830 + ... + 2442861.

Almost surely, 2^78171056 is an apocalyptic number.

It is an amenable number.

78171056 is a deficient number, since it is larger than the sum of its proper divisors (73285396).

78171056 is a wasteful number, since it uses less digits than its factorization.

78171056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885699 (or 4885693 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 78171056 is about 8841.4397017680. The cubic root of 78171056 is about 427.5779751295.

The spelling of 78171056 in words is "seventy-eight million, one hundred seventy-one thousand, fifty-six".