78286256493 has 8 divisors (see below), whose sum is σ = 105006715968. Its totient is φ = 51878317344.

The previous prime is 78286256471. The next prime is 78286256507. The reversal of 78286256493 is 39465268287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78286256493 - 2⁹ = 78286255981 is a prime.

It is a super-2 number, since 2×78286256493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78286256413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78129496 + ... + 78130497.

It is an arithmetic number, because the mean of its divisors is an integer number (13125839496).

Almost surely, 2^78286256493 is an apocalyptic number.

It is an amenable number.

78286256493 is a deficient number, since it is larger than the sum of its proper divisors (26720459475).

78286256493 is a wasteful number, since it uses less digits than its factorization.

78286256493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156260163.

The product of its digits is 34836480, while the sum is 60.

The spelling of 78286256493 in words is "seventy-eight billion, two hundred eighty-six million, two hundred fifty-six thousand, four hundred ninety-three".