78255955261 has 8 divisors (see below), whose sum is σ = 85423276224. Its totient is φ = 71097491520.

The previous prime is 78255955241. The next prime is 78255955273. The reversal of 78255955261 is 16255955287.

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

It is not a de Polignac number, because 78255955261 - 2⁷ = 78255955133 is a prime.

It is a super-3 number, since 3×78255955261³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78255955241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2195820 + ... + 2231173.

It is an arithmetic number, because the mean of its divisors is an integer number (10677909528).

Almost surely, 2^78255955261 is an apocalyptic number.

It is an amenable number.

78255955261 is a deficient number, since it is larger than the sum of its proper divisors (7167320963).

78255955261 is a wasteful number, since it uses less digits than its factorization.

78255955261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428611.

The product of its digits is 7560000, while the sum is 55.

The spelling of 78255955261 in words is "seventy-eight billion, two hundred fifty-five million, nine hundred fifty-five thousand, two hundred sixty-one".