78956571 has 8 divisors (see below), whose sum is σ = 110816320. Its totient is φ = 49867272.

The previous prime is 78956567. The next prime is 78956593. The reversal of 78956571 is 17565987.

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

It is not a de Polignac number, because 78956571 - 2² = 78956567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78956571.

It is not an unprimeable number, because it can be changed into a prime (78956071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692545 + ... + 692658.

It is an arithmetic number, because the mean of its divisors is an integer number (13852040).

Almost surely, 2^78956571 is an apocalyptic number.

78956571 is a deficient number, since it is larger than the sum of its proper divisors (31859749).

78956571 is a wasteful number, since it uses less digits than its factorization.

78956571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385225.

The product of its digits is 529200, while the sum is 48.

The square root of 78956571 is about 8885.7510093407. The cubic root of 78956571 is about 429.0054009024.

The spelling of 78956571 in words is "seventy-eight million, nine hundred fifty-six thousand, five hundred seventy-one".