78285673619 has 4 divisors (see below), whose sum is σ = 78385147944. Its totient is φ = 78186199296.

The previous prime is 78285673607. The next prime is 78285673813. The reversal of 78285673619 is 91637658287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91637658287 = 7 ⋅13091094041.

It is a cyclic number.

It is not a de Polignac number, because 78285673619 - 2⁴ = 78285673603 is a prime.

It is a super-3 number, since 3×78285673619³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78285675619) 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, 49735982 + ... + 49737555.

It is an arithmetic number, because the mean of its divisors is an integer number (19596286986).

Almost surely, 2^78285673619 is an apocalyptic number.

78285673619 is a deficient number, since it is larger than the sum of its proper divisors (99474325).

78285673619 is an equidigital number, since it uses as much as digits as its factorization.

78285673619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99474324.

The product of its digits is 30481920, while the sum is 62.

The spelling of 78285673619 in words is "seventy-eight billion, two hundred eighty-five million, six hundred seventy-three thousand, six hundred nineteen".