78285859945 has 16 divisors (see below), whose sum is σ = 99476924688. Its totient is φ = 58940006400.

The previous prime is 78285859921. The next prime is 78285859969. The reversal of 78285859945 is 54995858287.

It is an interprime number because it is at equal distance from previous prime (78285859921) and next prime (78285859969).

It can be written as a sum of positive squares in 8 ways, for example, as 35868121 + 78249991824 = 5989^2 + 279732^2 .

It is not a de Polignac number, because 78285859945 - 2³³ = 69695925353 is a prime.

It is a super-2 number, since 2×78285859945² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367395 + ... + 1423495.

It is an arithmetic number, because the mean of its divisors is an integer number (6217307793).

Almost surely, 2^78285859945 is an apocalyptic number.

It is an amenable number.

78285859945 is a deficient number, since it is larger than the sum of its proper divisors (21191064743).

78285859945 is a wasteful number, since it uses less digits than its factorization.

78285859945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72540.

The product of its digits is 290304000, while the sum is 70.

The spelling of 78285859945 in words is "seventy-eight billion, two hundred eighty-five million, eight hundred fifty-nine thousand, nine hundred forty-five".