78580851 has 16 divisors (see below), whose sum is σ = 113301504. Its totient is φ = 48255104.

The previous prime is 78580849. The next prime is 78580889. The reversal of 78580851 is 15808587.

It is a cyclic number.

It is not a de Polignac number, because 78580851 - 2¹ = 78580849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78580951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13995 + ... + 18788.

It is an arithmetic number, because the mean of its divisors is an integer number (7081344).

Almost surely, 2^78580851 is an apocalyptic number.

78580851 is a deficient number, since it is larger than the sum of its proper divisors (34720653).

78580851 is a wasteful number, since it uses less digits than its factorization.

78580851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32850.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 78580851 is about 8864.5840849980. The cubic root of 78580851 is about 428.3238352583.

It can be divided in two parts, 7 and 8580851, that added together give a palindrome (8580858).

The spelling of 78580851 in words is "seventy-eight million, five hundred eighty thousand, eight hundred fifty-one".