78288155286 has 64 divisors (see below), whose sum is σ = 172243501056. Its totient is φ = 23524935200.

The previous prime is 78288155263. The next prime is 78288155287. The reversal of 78288155286 is 68255188287.

It is a super-2 number, since 2×78288155286² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 15759175 + ... + 15764141.

It is an arithmetic number, because the mean of its divisors is an integer number (2691304704).

Almost surely, 2^78288155286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78288155286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86121750528).

78288155286 is an abundant number, since it is smaller than the sum of its proper divisors (93955345770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78288155286 is a wasteful number, since it uses less digits than its factorization.

78288155286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937.

The product of its digits is 17203200, while the sum is 60.

The spelling of 78288155286 in words is "seventy-eight billion, two hundred eighty-eight million, one hundred fifty-five thousand, two hundred eighty-six".