78289298287 has 8 divisors (see below), whose sum is σ = 79071555200. Its totient is φ = 77508205344.

The previous prime is 78289298273. The next prime is 78289298299.

78289298287 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78289298287 is a prime.

It is a super-2 number, since 2×78289298287² (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 (78289298257) 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, 155487 + ... + 425152.

It is an arithmetic number, because the mean of its divisors is an integer number (9883944400).

Almost surely, 2^78289298287 is an apocalyptic number.

78289298287 is a deficient number, since it is larger than the sum of its proper divisors (782256913).

78289298287 is a wasteful number, since it uses less digits than its factorization.

78289298287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581985.

The product of its digits is 130056192, while the sum is 70.

The spelling of 78289298287 in words is "seventy-eight billion, two hundred eighty-nine million, two hundred ninety-eight thousand, two hundred eighty-seven".