78014641 has 4 divisors (see below), whose sum is σ = 78891300. Its totient is φ = 77137984.

The previous prime is 78014623. The next prime is 78014647. The reversal of 78014641 is 14641087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14641087 = 23 ⋅636569.

It can be written as a sum of positive squares in 2 ways, for example, as 5424241 + 72590400 = 2329^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 78014641 - 2⁹ = 78014129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78014647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438196 + ... + 438373.

It is an arithmetic number, because the mean of its divisors is an integer number (19722825).

Almost surely, 2^78014641 is an apocalyptic number.

It is an amenable number.

78014641 is a deficient number, since it is larger than the sum of its proper divisors (876659).

78014641 is an equidigital number, since it uses as much as digits as its factorization.

78014641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876658.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78014641 is about 8832.5897108379. The cubic root of 78014641 is about 427.2925998288.

The spelling of 78014641 in words is "seventy-eight million, fourteen thousand, six hundred forty-one".