78285859729 has 16 divisors (see below), whose sum is σ = 99444723840. Its totient is φ = 59850984960.

The previous prime is 78285859723. The next prime is 78285859763. The reversal of 78285859729 is 92795858287.

It is a cyclic number.

It is not a de Polignac number, because 78285859729 - 2⁵ = 78285859697 is a prime.

It is a super-2 number, since 2×78285859729² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78285859723) 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, 9587424 + ... + 9595585.

It is an arithmetic number, because the mean of its divisors is an integer number (6215295240).

Almost surely, 2^78285859729 is an apocalyptic number.

It is an amenable number.

78285859729 is a deficient number, since it is larger than the sum of its proper divisors (21158864111).

78285859729 is a wasteful number, since it uses less digits than its factorization.

78285859729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19183080.

The product of its digits is 203212800, while the sum is 70.

The spelling of 78285859729 in words is "seventy-eight billion, two hundred eighty-five million, eight hundred fifty-nine thousand, seven hundred twenty-nine".