78016613 has 4 divisors (see below), whose sum is σ = 78452640. Its totient is φ = 77580588.

The previous prime is 78016607. The next prime is 78016619. The reversal of 78016613 is 31661087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (78016607) and next prime (78016619).

It is a cyclic number.

It is not a de Polignac number, because 78016613 - 2¹⁴ = 78000229 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 78016613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78016619) 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, 217745 + ... + 218102.

It is an arithmetic number, because the mean of its divisors is an integer number (19613160).

Almost surely, 2^78016613 is an apocalyptic number.

It is an amenable number.

78016613 is a deficient number, since it is larger than the sum of its proper divisors (436027).

78016613 is a wasteful number, since it uses less digits than its factorization.

78016613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436026.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 78016613 is about 8832.7013421716. The cubic root of 78016613 is about 427.2962000672.

The spelling of 78016613 in words is "seventy-eight million, sixteen thousand, six hundred thirteen".