78288155285 has 8 divisors (see below), whose sum is σ = 99472009176. Its totient is φ = 58946375680.

The previous prime is 78288155263. The next prime is 78288155287. The reversal of 78288155285 is 58255188287.

It can be written as a sum of positive squares in 4 ways, for example, as 18817529329 + 59470625956 = 137177^2 + 243866^2 .

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

It is not a de Polignac number, because 78288155285 - 2³⁴ = 61108286101 is a prime.

It is a super-2 number, since 2×78288155285² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78288155287) 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, 460518476 + ... + 460518645.

It is an arithmetic number, because the mean of its divisors is an integer number (12434001147).

Almost surely, 2^78288155285 is an apocalyptic number.

It is an amenable number.

78288155285 is a deficient number, since it is larger than the sum of its proper divisors (21183853891).

78288155285 is a wasteful number, since it uses less digits than its factorization.

78288155285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921037143.

The product of its digits is 14336000, while the sum is 59.

The spelling of 78288155285 in words is "seventy-eight billion, two hundred eighty-eight million, one hundred fifty-five thousand, two hundred eighty-five".