78081459 has 16 divisors (see below), whose sum is σ = 110613888. Its totient is φ = 48822912.

The previous prime is 78081449. The next prime is 78081463. The reversal of 78081459 is 95418087.

It is not a de Polignac number, because 78081459 - 2¹⁶ = 78015923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78081459.

It is not an unprimeable number, because it can be changed into a prime (78081439) 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, 13164 + ... + 18150.

It is an arithmetic number, because the mean of its divisors is an integer number (6913368).

Almost surely, 2^78081459 is an apocalyptic number.

78081459 is a deficient number, since it is larger than the sum of its proper divisors (32532429).

78081459 is a wasteful number, since it uses less digits than its factorization.

78081459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5314.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 78081459 is about 8836.3713706476. The cubic root of 78081459 is about 427.4145542439.

The spelling of 78081459 in words is "seventy-eight million, eighty-one thousand, four hundred fifty-nine".