78240652259 has 16 divisors (see below), whose sum is σ = 97553030400. Its totient is φ = 60962840160.

The previous prime is 78240652229. The next prime is 78240652267. The reversal of 78240652259 is 95225604287.

It is a cyclic number.

It is not a de Polignac number, because 78240652259 - 2¹² = 78240648163 is a prime.

It is a super-2 number, since 2×78240652259² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78240652229) 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 15 ways as a sum of consecutive naturals, for example, 1990157 + ... + 2029089.

It is an arithmetic number, because the mean of its divisors is an integer number (6097064400).

Almost surely, 2^78240652259 is an apocalyptic number.

78240652259 is a deficient number, since it is larger than the sum of its proper divisors (19312378141).

78240652259 is a wasteful number, since it uses less digits than its factorization.

78240652259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65050.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 78240652259 in words is "seventy-eight billion, two hundred forty million, six hundred fifty-two thousand, two hundred fifty-nine".