78572851 has 8 divisors (see below), whose sum is σ = 91988064. Its totient is φ = 65705280.

The previous prime is 78572831. The next prime is 78572869. The reversal of 78572851 is 15827587.

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

It is a cyclic number.

It is not a de Polignac number, because 78572851 - 2⁷ = 78572723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78572798 and 78572807.

It is not an unprimeable number, because it can be changed into a prime (78572801) 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, 136600 + ... + 137173.

It is an arithmetic number, because the mean of its divisors is an integer number (11498508).

Almost surely, 2^78572851 is an apocalyptic number.

78572851 is a deficient number, since it is larger than the sum of its proper divisors (13415213).

78572851 is a wasteful number, since it uses less digits than its factorization.

78572851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273821.

The product of its digits is 156800, while the sum is 43.

The square root of 78572851 is about 8864.1328397086. The cubic root of 78572851 is about 428.3092994568.

The spelling of 78572851 in words is "seventy-eight million, five hundred seventy-two thousand, eight hundred fifty-one".