78264771238 has 16 divisors (see below), whose sum is σ = 119218145904. Its totient is φ = 38526063840.

The previous prime is 78264771227. The next prime is 78264771239. The reversal of 78264771238 is 83217746287.

It is a super-2 number, since 2×78264771238² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78264771239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65556 + ... + 401032.

It is an arithmetic number, because the mean of its divisors is an integer number (7451134119).

Almost surely, 2^78264771238 is an apocalyptic number.

78264771238 is a deficient number, since it is larger than the sum of its proper divisors (40953374666).

78264771238 is a wasteful number, since it uses less digits than its factorization.

78264771238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337287.

The product of its digits is 6322176, while the sum is 55.

The spelling of 78264771238 in words is "seventy-eight billion, two hundred sixty-four million, seven hundred seventy-one thousand, two hundred thirty-eight".